Engine mount bosses
#1308252
09/21/12 02:47 PM
09/21/12 02:47 PM
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Joined: Mar 2006
Posts: 1,611
Pataskala, Ohio
GTX70sixpack
OP
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OP
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Posts: 1,611
Pataskala, Ohio
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I don't do a lot of small blocks and we have a 318 I built years ago that we are using in a 66 A100. The boss on the passenger side is wrong for all the small block mounts I have (5 sets) I have a 61 poly and the bosses are correct, the only other LA's I have are 360's and they are like the 318. Are there year differences in the bosses or pass car/truck differences?
I am welding up a mount but was curious about the cast bosses on the block. I know there are big block differences as to how the lugs are machined and of coarse big block A-bodies the left side is different.
65 Belvedere II Station Wagon
69 Coronet R/T convertible
70 GTX
70'cuda
99 Dodge Diesel dually 4X4
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Re: Engine mount bosses
[Re: Andrewh]
#1308254
09/21/12 04:15 PM
09/21/12 04:15 PM
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Joined: Jan 2003
Posts: 75,047
U.S.S.A.
JohnRR
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I Win
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U.S.S.A.
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Quote:
it is my understanding that all 318's are the same, and even the magnum has a set to bolt up the old LA style.
360 mounts are different on one side, but the same on the other, but don't remember which is which.
perhaps you have the sides mixed up?
360 drivers side mount is different than a 318 , pass side is the same .
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Re: Engine mount bosses
[Re: JohnRR]
#1308255
09/21/12 07:30 PM
09/21/12 07:30 PM
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Joined: Mar 2006
Posts: 1,611
Pataskala, Ohio
GTX70sixpack
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OP
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Joined: Mar 2006
Posts: 1,611
Pataskala, Ohio
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Quote:
Quote:
it is my understanding that all 318's are the same, and even the magnum has a set to bolt up the old LA style.
360 mounts are different on one side, but the same on the other, but don't remember which is which.
perhaps you have the sides mixed up?
360 drivers side mount is different than a 318 , pass side is the same .
No, I am not mixed up, but I do very little with small blocks. This is a 318, 1979. The passenger side bosses have 2 holes in the front and 1 upper hole in the rear like in the picture. Both 360s I have are also like this. All of the mounts I have use 2 holes on the rear and 1 upper in front(one set bought here for A100, one set from my Sons V-8 A100, a set from my 73 van, and 2 passenger car sets, all mine were labled when they came off)
I have 2 poly 318s and they have 2 holes in the rear and 1 upper front. 273s and early 318 are like this.
This is the way the mounting lugs are positioned on the 79 318 I am using.
65 Belvedere II Station Wagon
69 Coronet R/T convertible
70 GTX
70'cuda
99 Dodge Diesel dually 4X4
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Re: Engine mount bosses
[Re: GTX70sixpack]
#1308256
09/21/12 07:39 PM
09/21/12 07:39 PM
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Joined: Mar 2006
Posts: 1,611
Pataskala, Ohio
GTX70sixpack
OP
top fuel
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OP
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Joined: Mar 2006
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Pataskala, Ohio
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I did a search at work and came up with nothing, searched at home with google and got my anwser. There are several mounting bosses, here are 2 other types. Here is a 4 hole
65 Belvedere II Station Wagon
69 Coronet R/T convertible
70 GTX
70'cuda
99 Dodge Diesel dually 4X4
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Re: Engine mount bosses
[Re: GTX70sixpack]
#1308257
09/21/12 07:45 PM
09/21/12 07:45 PM
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Joined: Mar 2006
Posts: 1,611
Pataskala, Ohio
GTX70sixpack
OP
top fuel
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OP
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Joined: Mar 2006
Posts: 1,611
Pataskala, Ohio
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And here is the older LA motors with 2 bosses in the rear and 1 up front. This is what the mounts I have are made for.
65 Belvedere II Station Wagon
69 Coronet R/T convertible
70 GTX
70'cuda
99 Dodge Diesel dually 4X4
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Re: Engine mount bosses
[Re: dogdays]
#1308260
09/21/12 07:53 PM
09/21/12 07:53 PM
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Joined: Mar 2006
Posts: 1,611
Pataskala, Ohio
GTX70sixpack
OP
top fuel
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OP
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Joined: Mar 2006
Posts: 1,611
Pataskala, Ohio
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Quote:
Is it worth pointing out that a 66 318 is a poly?
R.
Reread, I never said anything about a 66 318. I said it is going in a 66 A100 PU. The 2 polys I have are a 61 and a 65.
Also there are at least 2 variations of the drivers side 340/360 bosses that I have found.
As usual no one reads what is asked or assumes the op doesn't have a clue and post a bunch of obvious comments, but after I found some pics tonight (don't know why none came up at lunchtime or I would not have asked) I have prof of at least 3 different variations.
If I had not scraped about 8, 273/318s last year I could have looked in my garage but I tossed every thing but 440s and 360s, I did keep 1 383hp boat anchor with 66k
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Re: Engine mount bosses
[Re: GTX70sixpack]
#1308261
09/21/12 08:05 PM
09/21/12 08:05 PM
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Joined: Sep 2007
Posts: 14,889
up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
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I have a 65 273 and an 87 318. The 273 has the htree hole mounts and the 318 has 4 as you have found out, so yes there are two different setups. The old DC engines book mentioned it and has drawings on how to mod the old mount to fit the new block, but someone said the drawings were wrong, so YMMV there.
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
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Re: Engine mount bosses
[Re: Supercuda]
#1308262
09/21/12 08:16 PM
09/21/12 08:16 PM
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Joined: Mar 2006
Posts: 1,611
Pataskala, Ohio
GTX70sixpack
OP
top fuel
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OP
top fuel
Joined: Mar 2006
Posts: 1,611
Pataskala, Ohio
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Quote:
I have a 65 273 and an 87 318. The 273 has the htree hole mounts and the 318 has 4 as you have found out, so yes there are two different setups. The old DC engines book mentioned it and has drawings on how to mod the old mount to fit the new block, but someone said the drawings were wrong, so YMMV there.
I already have the piece cut to weld in, never thought about looking in my old DC books, thanks for reminding me there is good information in them. 
I have found 3 different variations so far, strange that all the mounts I have are for the same setup
65 Belvedere II Station Wagon
69 Coronet R/T convertible
70 GTX
70'cuda
99 Dodge Diesel dually 4X4
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Re: Engine mount bosses
[Re: GTX70sixpack]
#1308263
09/21/12 08:43 PM
09/21/12 08:43 PM
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Joined: Apr 2005
Posts: 12,271
Overpriced Housing Central
RobX4406
I Live Here
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I Live Here
Joined: Apr 2005
Posts: 12,271
Overpriced Housing Central
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Since you aren't specific about what you are actually working on, as in what engine in which chassis. Good luck with it. If it's not a car chassis have fun. Happy to help and provide worthless input! 
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Re: Engine mount bosses
[Re: dogdays]
#1308265
09/21/12 11:11 PM
09/21/12 11:11 PM
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Joined: Aug 2003
Posts: 43,228
Bend,OR USA
Cab_Burge
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I Win
Joined: Aug 2003
Posts: 43,228
Bend,OR USA
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Quote:
Is it worth pointing out that a 66 318 is a poly?
R.
Not true, if it is a LA 318    I almost got into a fight with a customer in a gas station that I worked part time two nights a week and one day on the weekend who had bought a new 1966 Dodge Charger, ended up it had a LA 318 in it, not a 273 like I told him it had   OP, the 1966 and later 318 and 273 have a different driver side engine mount lug pattern than all of the 340 and 360 do, the passenger sides are the same on all of those 1966 and later SB blocks I've seen in 47 years of building and racing Mopars
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Engine mount bosses
[Re: Cab_Burge]
#1308266
09/22/12 01:37 AM
09/22/12 01:37 AM
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Joined: Mar 2006
Posts: 1,611
Pataskala, Ohio
GTX70sixpack
OP
top fuel
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OP
top fuel
Joined: Mar 2006
Posts: 1,611
Pataskala, Ohio
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Since there is still confussion;
1 I modified a mount for my need, there is no problem, I do not need luck. I put a nailhead in a 54 Ford, built T-buckets from scratch (home made rails), back halfed cars, built front suspensions from junk, and have help build some of the nicer show cars in the midwest (check out 70 Cougar Eleminator at the Ford Museum. Adding a ear to a engine mount is nothing.
2 The question was "how many different variations of mounting lugs are there on the passenger side of a 318". It does not matter what it is going in, I simply mentioned what it was going in in passing.
3 There are 3 variations on the passenger side of a 318. I have shown pictures of each above so we now know the right side of a 318 can have 3 different mounting boss configurations.
4 That still leaves us with the question "is the differences in model year or is it a car verses truck difference or both".
5 Now I will really throw you a curve. How many of you have seen a 318 with the International Harvester symbol on the side of the block? Yes, Chrysler had IH help cast blocks for them in the 70's. I have owned 2.
65 Belvedere II Station Wagon
69 Coronet R/T convertible
70 GTX
70'cuda
99 Dodge Diesel dually 4X4
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