Holley Main Body Upgrade Question

I didn't answer your questions the first time but I can.


1. Yes
2. Yes
3. Billet
4. 3 makes 4 obsolete.

You can open up the ISB on the main body but if it's the press in variety it's a pain in the ***. You are better off with a main body that has changeable bleeds.

There is no reason to ever buy a carb that doesn't have changeable bleeds anymore. BLP and other companies have the cost so low it's just crazy. Then you need to look at billet metering blocks. You'll find out most of the Holley stuff is high price low grade.

Tuning you carb is a very satisfying experience. You learn something and gain performance at the same time.