Quote:
Originally Posted by 68Cuda
If the money is not an issue, go EFI. You will have to swap out the whole fuel system though.
By the way, quite a few cars on this site do not have LS engines...
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I had one of those Weiand 440 Six Pack "super stock" manifolds back in the 70's on my Mopar, that thing had HORRIBLE! Fuel distribution problems, I nearly took a piston out with that thing....sold it for cheap...I hear they are worth some $$$ nowadays..
Back to OP, you want a billet mechanical fuel pump and do yourself a favor and make sure that big Rat motor has a lightweight fuel pump pushrod in it for high RPM reliability. The Carter AFB dual quads aren't known for being a good road race style carb, a single big Holley 4bbl carb will probably make more power and perform better in hard cornering. My buddy is building a touring 55 Chevy and he's using that dual quad intake with 2 FAST 4bbl throttle body/injectors on his 454 motor, he had a aluminum plate CNC'd to offset the throttle body's and make them fit the intake, it probably won't make as much power as a well done port fuel injection intake but, he wanted the 2X4bbl look on his motor. When the bill is all totaled up, I think he will have around $4K invested in his EFI project....about 1/2 the price of an all aluminum LS3 crate engine
When you replace the fuel lines go with PFTE or "Teflon" style hoses as they can tolerate the ethanol in modern pump gas. Earls, Fragola, Tech AFX are some good sources for PFTE style hose/fittings.
I'm looking closer at you engine photos....looks like you have a good billet mechanical pump on that Rat motor....rebuild kits can be sourced from Speedway Motors or CV products if you think then fuel pump diaphragm/check valves have problems.