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Putting a '98 5.2 in an '82 RC with NP435. What do I need? #1819797
05/05/15 11:48 PM
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Dennis_K Offline OP
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I plan to replace an LA 318 in an '82 Ramcharger with the NP435 4-speed trans. I was told that I would need a bellhousing and hydraulic clutch setup from a newer truck to make the magnum exhaust manifolds work. Can anyone confirm this? Also seeking any other advice or wisdom from anyone else who has done this swap.


I finally made it to the end of the rainbow. Murphy was standing there to tell me that the pot of gold was at the other end.
Re: Putting a '98 5.2 in an '82 RC with NP435. What do I need? [Re: Dennis_K] #1819881
05/06/15 12:54 AM
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The Magnum exhaust dumps about where the Z bar for the manual clutch would be.
Are you keeping the EFI or swapping to carb?
Gene

Re: Putting a '98 5.2 in an '82 RC with NP435. What do I need? [Re: poorboy] #1819893
05/06/15 01:05 AM
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Dennis_K Offline OP
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I've got a carb on it. I'm going to put the cam snout extender on it and put a timing cover from the LA and use the mechanical fuel pump.


I finally made it to the end of the rainbow. Murphy was standing there to tell me that the pot of gold was at the other end.
Re: Putting a '98 5.2 in an '82 RC with NP435. What do I need? [Re: Dennis_K] #1820038
05/06/15 10:46 AM
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use the LA exhaust or headers

hedman 79080 for 2x truck

hedman 79170 for 2x - 4x4 with the magnum/hydro trans bell

you need a magnum fly wheel and the newer pilot bearing that goes in the auto TC hub register in the crank.

IIRC,magnum manifolds do not fit unless everything from a 92-93 d series chassis is used.

I used a 93 NV4500 with a hydro bell in my 85 truck with LA 318, had to have the hedman 79170 to clear the bell housing/mini starter. used a 88-v-6 hydro bell/flywheel on the LA 318.

I am doing a 4x4 conversion on a 2x chassis and will be adding the hydro clutch to the NP435 4 speed to a LA 318.

parts are out there and just need the right pieces to mix-match up yrs to get it together.

look for 92-93 d-150 d-250 d-350 trucks/RC with 5.2 or 5.9 magnum gas engines

FYI 5.2 5.9 and v-6 hydro bells are what you are looking for/they fit the 833/833OD/NP435/a535 5-speed and the NV4500 hydro bell fits the 5 speed only.

if going to convert to hydro clutch there are a couple pieces needed to use stock parts.

Re: Putting a '98 5.2 in an '82 RC with NP435. What do I need? [Re: Dennis_K] #1820064
05/06/15 11:14 AM
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savoy64 Offline
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on the clutch master it indexes into a 1 inch square hole in the firewall---only source i know of is mid 80-90's chevy trucks--they have a bolt in plate with the square hole--- i have used them twice in cummins conversions---sure wish there was another easier source....

Re: Putting a '98 5.2 in an '82 RC with NP435. What do I need? [Re: savoy64] #1820143
05/06/15 12:10 PM
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dodge uses a piece that bolts to thepedel structure with 4 bolts.

the hole in fire wall is just that. a hole bigger than needed.

master cyl goes in hole then twist locks into the bracket under dash. has a small plastic roll pin to lock it from turning.

a rubber groumet is on the MC and covers/seals the hole in fire wall.

on a truck before hydro clutch there are 4 dimples in the pedal structure but not drilled. and no hole in firewall.

the MC bracket is like a peace of angle bent into a 90* with 4 holes for mounting on 1 side and a large hole with notch for MC to twist lock into.

I have some pics of my hydro clutch 5 speed swap into a 85 chassis. used all bolt on dodge pieces.

Last edited by scratchnfotraction; 05/06/15 12:12 PM.
Re: Putting a '98 5.2 in an '82 RC with NP435. What do I need? [Re: scratchnfotraction] #1820248
05/06/15 02:52 PM
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Dennis_K Offline OP
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Maybe I should back up a little with the history of this truck. When I bought it, it had the magnum engine with the LA exhaust manifolds in it already, but it was a poorly done swap. The carb was jetted way too lean, the exhaust leaked everywhere, the electric fuel pump kept blowing fuses, the Y-pipe was wedged tight against the bottom of the trans, and a few other problems that I don't remember, so I pulled it out and dropped in a '79 318 that I had, but now that engine is getting tired and burning oil so I want to give the magnum another chance and do the swap right. What's the difference between the magnum and the LA flywheel? I've had the same one on both engines and didn't notice any vibration with either. How can I tell which engine it is correct for?


I finally made it to the end of the rainbow. Murphy was standing there to tell me that the pot of gold was at the other end.
Re: Putting a '98 5.2 in an '82 RC with NP435. What do I need? [Re: Dennis_K] #1820291
05/06/15 03:42 PM
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IIRC the balance for the 318LA and magnum 5.2 are different. both internal balance and very close to the same but magnum rods are thinner small end/lighter.

I would use the magnum replacement flywheel from advanced auto for 130$ I replaced the one on my sons 94 5.2 magnum/NV3500

this will be correct for the 5.2 engine. BUT! you might get away with the LA flywheel and not FEEL the vib.

next is the magnum pilot bearing.

my 88-d100 v-6/a535 5 speed hydro bell has 2 trans bolt pattern, one for the 8333/833OD/a535 5-speed and also has the NP435 granny 4 speed pattern. (it would not fit my 92-NV4500 5 speed)

the 82 mech bell should fit the magnum also running the magnum flywheel but use the newer magnum pilot bearing.

for hydro clutch are you piecing a cheap homemade set up with mech bell or going 88-93 hydro bell?

either way I suggest the hedman 79170 long tubes for it. I have a set of ram tubes on a 94-5.2 magnum truck and would not use them again, no where near the gain of long tubes in a 82 chassis.

pilot bearing for 92 nv4500 #1.jpgpilot bearing for 92 nv4500 #2.jpg
Re: Putting a '98 5.2 in an '82 RC with NP435. What do I need? [Re: scratchnfotraction] #1820300
05/06/15 03:52 PM
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here in this pic you see the red bracket that mounts the clutch MC mounted under the dash on side of pedal/colum structure.

it does not touch the firewall and the wall needs no support added.

this pic was in reference to the bulkhead connection hole being smaller on 87-93 trucks in some other posts here on moparts when I swaped the 85 cab for a 91 cab with 5 speed.

it is the same size but moved over slightly for the clutch MC




floor patch # 64.jpgfloor patch 14.jpg
Last edited by scratchnfotraction; 05/06/15 03:54 PM.
Re: Putting a '98 5.2 in an '82 RC with NP435. What do I need? [Re: scratchnfotraction] #1820301
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this piece is like finding hens teeth in the JY

all mopar did was add the offset flat stock with the stud for the MC rod to a mech clutch pedal. they seem the same other than the add hydo piece.

floor patch 15.jpg
Last edited by scratchnfotraction; 05/06/15 03:58 PM.
Re: Putting a '98 5.2 in an '82 RC with NP435. What do I need? [Re: scratchnfotraction] #1820305
05/06/15 04:02 PM
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FYI, for stock hydro clutch lines I used these Russel fittings to swap over to AN-3 braid line from the stock pre-mold plastic line on the stock mopar MC/slave cyl.

hydro fittings.jpg
Re: Putting a '98 5.2 in an '82 RC with NP435. What do I need? [Re: scratchnfotraction] #1820308
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this is it sitting with a set of hedman 79080 2x D series headers. fit is great but I went to put the mini starter on the NV4500 hydro bell and was a no go due to #7 tube in the way.

the hedman 79170 4x4 header fit 72-93 4x4 chassis and #7 tube is moved for starter clearance/now fits a short LA starter or a mini starter. (you can R&R the mini with out header removal)

the hardest 2 things I see for you are the hydro clutch MC mounting bracket and drilling the 4 holes in the dimples your 82 has in that spot.

if you drilled a pilot hole in the firewall from inside dead center of the bracket while mounted a 2.5 hole saw would take the firewall out easy enough.

floor patch # 85.jpg
Last edited by scratchnfotraction; 05/06/15 04:16 PM.
Re: Putting a '98 5.2 in an '82 RC with NP435. What do I need? [Re: Dennis_K] #1820313
05/06/15 04:21 PM
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LOL! I did it the hard way and replaced the 85 cab for a 91 cab to keep from having to drill those 4 holes under the dash to mount the MC.

I was told the NV4500 5 speed would need the 93 crossmember moved back 2" in the 85 chassis and need new holes drilled for it.

NOT! I trimed the stock 85 2x crossmember/turn trans mount around 180* with some trimming/bolted it right in the stock 85 chassis location.

just enough clearance to clear the 5th gear/tailhousing.

floor patch # 77.jpgfloor patch # 78.jpg
Last edited by scratchnfotraction; 05/06/15 04:24 PM.
Re: Putting a '98 5.2 in an '82 RC with NP435. What do I need? [Re: Dennis_K] #1820315
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Dennis_K Offline OP
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Thanks for all the advice. I don't have any definite plans yet, just gathering info at this point, but if I decide to use magnum exhaust manifolds and an hydro clutch, I will use the correct factory bellhousing. I would like to use all factory parts if possible, I just need to know what parts will fit and work together and what year trucks I need to look for in the salvage yards. I like manifolds better than headers, but if I decide to use headers, do you know of any that would work with the factory 82 mechanical clutch linkage? I'd rather not use the LA style exhaust manifolds. Seems to be a waste to use the high flowing magnum heads and then choke them off with the LA exhaust system which is why I was thinking of magnum manifolds.
Wow! I see you have been buys posting pics while I was posting this. Thanks again! I will look at all this info and try to come up with a definite plan.

Last edited by Dennis_K; 05/06/15 04:29 PM.

I finally made it to the end of the rainbow. Murphy was standing there to tell me that the pot of gold was at the other end.
Re: Putting a '98 5.2 in an '82 RC with NP435. What do I need? [Re: Dennis_K] #1820316
05/06/15 04:27 PM
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NOW I am building a 82 W350 flatbed swaping on a 88 cab for hydro clutch on the NP435 4 speed 205 xfer.

just got the hydro bell and need the MC bracket for under dash.

hens teeth I say. been 4 month looking now.

Re: Putting a '98 5.2 in an '82 RC with NP435. What do I need? [Re: scratchnfotraction] #1820381
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the hedman long tube 79170 fit 72-93 2x and 4x4 chassis.

this will fit nice with either mech bell or hydro bell.

I agree, much better to use stock parts with this kind of swaps.

let me know if I can help out.

Re: Putting a '98 5.2 in an '82 RC with NP435. What do I need? [Re: Dennis_K] #1820397
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SFT, whip yourself with a wet noodle.

Flywheels are the same. You have to know what bellhousing goes with your flywheel, but past that both are neutral balanced and have the same hub.

All Mopar smallblocks smaller than 340 cubic inches are internally balanced. Poly, 273, 318, 5.2 Mag, all the same neutral balance. I believe the 4.7 cammer as well is N. B.

NP435s have a 5.125 front register which is the same as the A833OD.

R.

Last edited by dogdays; 05/06/15 06:21 PM.






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