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Original Message
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| RE: 390 buildup over winter |
| By Bob - 11/11/2001 9:27:09 AM; IP 65.80.202.151 |
Check you air cleaner to hood clearance before changeing manifolds. As I recall there isn't much and the Performer may put the carburetor up to high.
Get the bigger CJ valves put in your heads with hardened exhaust valve seats; intake valve seats do not get as hot so hardened seats are a waste of money there.
Porting and polishing is for all out Racers. Porting can mess up airflow if not done right. Port matching is worth doing. Instead of porting, CC your heads which is something you can do yourself. Having the combustions chambers exactly the same size improves performance and makes the engine really idle smooth.
Buy the cam and kit (valve springs, retainers, etc.) from a Cam Vendor as a package and you will get better prices and a setup that works together. And Edelbrock is NOT a Cam Vendor.
A Holley carburetor of 600 CFM or so is about right. That's what was on the 390GT. A larger carburetor is OK but will hurt low end torque a bit so I wouldn't use one useless I was racing. Get the center pivot bowls if you want it to look hot. Then you can tell everyone you have a 780 or an 850 and most people won't know the difference anyway.
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