Reply to "Cam & Intake Manifold Replacement"

Cowboy & Dan:
You guys have been a HUGE help. Thanks for the diagnostics on my build. Again, I have not had the engine apart, so with the exception of the heads, manifold, carb, and rockers, it is difficult to verify any of the internals.

I made a mistake on the exhaust specs. I originally had the stock ANSAs with 1-7/8" OD to the header collector. I went with a 2-1/4" inlet "Power-Pack" type muffler. The tubing from the collector to the muffler is 2-1/4". I saw results on the dyno in a gain of about 15 HP with these mufflers. Magnaflows, as Dan pointed out would probably be better.

My club has a Dyno Day in October. In preparation for this, I'll take Dan's advice and get the O-2 bung welded in. I am goinf to try to tune/ re-jet the existing carb first before making any carb changes. Getting the timing fine-tunes at the same time. Based upon the results of the "low-buck" mods, I'll stick with the Edelbrock 4V and if necessary, change the carb first, looking at the Holley HP line. Any feedback on the Barry Grant carbs? Some of the guys in the club are very happy with them.

Next step would be the cam change (looking at the Comps 3315 roller or Crane #529551.

Thnaks again boys!

Swen