427 Chevy Tall Deck Question

[pacebm]

I have a 427 chevy tall deck with a low compression hydraulic cam. I have a crack in the intake and I would like to replace the carburetor as well. Can you fella's give me some advice becasue everyone I talk to knows nothing about the tall deck motors. I have heard they make some spacers to use regular 427 intakes but I am not sure what intake/carburetor combo I should go with. Any advice or help is greatly appreciated.

[brute4c]

Is this going in an M715 or something else? Big effect on manifold choice what you are planning to use it for.

[randyscycle]

Tall deck big blocks do use a different, wider intake. I think that they do make adapters, but I also remember seeing some manifolds being offered for them now in aluminum to accept Holley's and the like.

A dual plane is best for lower end low RPM torque. An open center intake is better for higher RPM.

As far as a carb, I think the truck motors had a 2bbl carb stock, but anything around a 650-750cfm should be sufficient for a stock motor.

[pacebm]

It is going in a 1967 M715. I bought it a while back but just getting around to fixing it up. I believe a guy named Brian Sisson built the truck. It's a solid truck and drivetrain but the intake has a crack and I keep having trouble with the plug in the intake for the old style water pump. I appreciate the replies. I don't know a lot but I do view the board pretty often and everyone on here is very generous with their knowledge.

[brute4c]

In this application I would think a dual plane would be the best best and keeptig the carb size to 750 MAX would be good...

[Barrman]

GM performance parts has an amazing array of tall deck parts since they starter offering the 572 crate engine. Edelbrock also offers a tall deck intake.

I have driven that truck. A 2 barrel did real good in all trail situations at LBL in 2004. I also followed that truck 200 miles or so down I-40 across Tennessee. It did 50-60 mph just fine.

[gimpyrobb]

I'm pretty sure I have a spare intake for you, if you want a stock one.

[pacebm]

I'm pretty sure I have a spare intake for you, if you want a stock one.

I appreciate the offer but I have also had trouble with keeping a plug in the intake since I am using a newer style water pump.

[robo]

I'm not so sure a dual plane would be best bet w/o knowing the main use (roads vs off-road), tire size, tranny, and gear ratio. I can tell you from experience that a higher rpm manifold works way better for heavier road use with stock gears/tires. Unless you're lugging trails, these engines don't see low rpms. Unless you like starting from 3rd or 4th gear!

[randyscycle]

Unless you're lugging trails, these engines don't see low rpms.

A tall deck big block is only good in stock form for about 5,000 RPM max, so a dual-plane would probably be the best choice. For highway driving, occasional bursts of 50-55 will be fine and you probably won't notice the difference in what kind of intake in on it then.