I bought a 408 stroker with aluminum Edelbrock heads, 10:1 compression, big muthr thumpr cam with a hydraulic flat tappet cam.

I need your thoughts on:

1. Carb choice (Edelbrock says use two 500 cfm, and Holley doesn't answer their phone, but i've been told that two Holley 465 cfm are made for this application).
2. linkage (progressive or one-to-one)
3. mechanical or electric fuel pump

This will be used on a 70 Cuda, 4spd with choice of gears (3.55, 3.91, or 4.10s), 15x8" wheels and BFGs.

Not really interested in much track time, but mainly a street cruiser with a nostalgic feel and look, but clearly good throttle response and power to fry tires at will.

Tell me what has worked for you, and any pictures showing linkage are appreciated.

Thanks.

I currently have a 360 with a Weiand tunnel ram and I run two holley 370 cfm carbs. I had two 450 holleys that Summit racing recommended for a tunnel ram but I could not get them to run well. I probably don`t have the HP of your stroker. Maybe others here with a combo closer to yours would be of more help. Also I do not run progressive linkage and I have a holley hp mechanical pump. I have some pictures but not on this computer. I can post them when I get back home. I run 4.56 gears and frying the tires is not a problem. Once I got the car tuned in the throttle response is awesome. Actually the car gets loose too easily. The car is a 77 Volare with a automatic trans.

I would put two Holley # 1850 600 CFM vacume secondary carbs. on it and run them in line with non progressive(staright one to one) linkage so your running it on both carbs. primary barrels at cruise, just like running to two barrels at low speed Everybody out there thinks SB Mopars are like SB Chevys and Fords There not You have to remember that the right foot controls how far the throttle is opened and how fast it is opened It is always better to have to much power than not quiet eneough, correct As far as the fuel system look at your stock fuel line and pick up in the tank, if they are the stock non HP 5/16 O.D. consider changing them both to 3/8 and then run a very good(200 GPH + ) electric pump mounted at the rear below the the pickup in the tank The better electric fuel pumps need a good fuel regulator also, I like and use Mananfuel now Put a 80 + micron fuel filter between the tank and the pump, if you really want to be safe on the fuel filters add another one between the pump and the carbs, a 10 micron unit

I feel you will have no disappointments or regrets going with 2 500cfm Edelbrocks. You will probably do some tweaking to them on your 408 but they will provide years even decades of trouble free service and are great performers. I have had 2 440 challengers with the CH-28 and 2 500s and the power and fun were thru the roof. I have a brother who is still running the 2 600s he bought back in 1992 (yes the carbs have been cleaned and refreshened a time or 2 since then.) His carbs first on an M1 tunnel ram 440 build in 1992 and then in 2006 when he built his 440 into a 512 but running the same tunnel ram and carbs. Im sure 2 Holley carbs will provide the same long term reliable service as well but I have experience with the Edelbrocks and am typing it here. I think we all know for absolute max power and the best ET the Holley carb wins.

a pair of 500cfm edelbrock carbs will most probably be a bolt on and go deal that wont require much tuning at all.. as for linkage,run them 1:1 linked togheter

Me thinks those that advocate using the Eddy or Carter 500 or 625 or 650 CFM carbs aren't thinking of the uneven air flow through the smaller primarys on those carbs Not so on the Holley 1850 Same thing on the Holley 650, 750 and 850 D.P. carbs, same flow through all four barrels

linkage

I might end up doing the same thing on my 408 thay has been for sale and nobody wants. Its a W2 408 with a girdle and built to run street/strip with ported heads. I have a single 4 barrel on it now, but I am thinking of putting the holley Dominator tunnel ram on it with a pair of 600 vacuum carbs. I have the 4150 top plate for it.

My research from numerous sources keeps bringing me back to the Holley 600cfm vacuum secondary carbs. Now I want adjustability, because I want my car running 6.90's in the 1/8th on pump gas so best I have found are these from quick fuel. In my past dealings with them, they will customize to suit your needs. I do not need a choke horn or the weird vent tubes, but the adjustable air bleeds are a must along with the adjustable vacuum system....I also do not need the vacuum port at the bottom of the carbs. Just simple straight up vacuum carbs with adjustable air bleeds and vacuum spring adjustments. I als don't want somebody's old worn out junk either. These are real nice for the cash, and I think they might fit the bill if my engine does not sell. I can go nostalgic old school with a pair of these...

I'm having a 406" B engine built with ported RPM heads and a Offy tunnel ram. The long block is the one Brian @ IMM built for the budget hemi power build. He's doing the heads and using 1.6 PRW rockers. The carbs are #4966S AVS carbs that I have used the jets and rods that are speced for the 500 cfm dual quad carbs. It will be getting dynoed so it will be interesting to see how the jetting plays out. It should be on the pump late August- those guys are really busy right now.

thanks for responses so far; still welcome more of your suggestions and pictures.
Leo

my friend that went to drag week with me hates edelbrock carbs with a passion. I have to keep reminding him that they are the reason we had no issues at all

I prefer the thunder series carbs

I called quick fuel, and to my surprise they quoted me two out of the box 650 double pumpers. Said the engine will want the fuel shot of the dual squirters and vacuum carbs are very in consistant..

I also have an EZ-efi on a vehicle with a single four barrel. Been thinking of putting the 408 in that vehicle with the tunnel ram and duel TBI's...The tune with EZ efi is much easier to keep track of and very consistant. Best all around of both worlds.