best 351c build up for street

[lewis_dd]

i have a '73 Mach 1 with the 351c 4v open chamber heads. I want to get some more power and speed from it my signiture shows what i have now. I have full length headers not installed tet, and could either put flat top pistons or put closed chamber heads a cam, etc.

any suggestions?

Thanks

Darren

 

[DarkoStoj]

i have a solid roller, 4v heads, long tube headers with 3" exaust, edelbrock dual plane intake, and edelbrock 600cfm carb.

I bought it like this, it doesn't pull hard until 4500rpm, and I think that it would rock with a different intake/carb

 

[rbohm]

first decide what rpm range you are going to run this engine about 85% of the time. a street/strip motor is different than a race motor, is different than a daily driver motor.

 

[milner351]

Generally for the street, 2v heads are better, and much more responsive in the lower rpm range...

 

[D.Hearne]

Swap the factory cam for something better like a Comp Cams 268H. That would boost the dynamic compression to help the open chambered heads and should improve the bottom end. I'm not a fan of Edelbrock carbs, so I'd go with a bigger Holley like a 670 Street Avenger or list - 80783-- 650 cfm vac. secondary carb. Summit's cam part # SUM-K5200 would also work well. I used one in a stock 400M and it really woke it up. Same open chambered heads but with 2 bbl ports as your 351C.

 

[351carlo]

Like D.Hearne said, I would get a camshaft.

I had good luck with CompCams 270H, a single pattern Magnum cam. I'm actually selling it with lifters for 100.

http://forums.stangnet.com/showthread.php?t=617202

 

[1320stang]

You could also put port plates in the exhaust side as well.

 

[Dan H]

For the street, get some Aussie heads (Closed Chamber, Small Ports) and a nice dual plane intake, a good cam, and good well tuned carb.

The closed chambers have much less trouble with detonation, and the smaller ports will have good TQ.