I bought a '78 Vette last May and, after adding some performance stuff, I'm looking to see what you guys have to say as being the best approach to tuning it to get the max out of her.

The engine was rebuilt right before I bought her and it ran great before I yanked it as it was. They put in a performance cam (the guy didn't remember the particulars but it was an edlebrock).

I added a Holley 750 and an intake (can't remember the brand off hand). The Dynomax ceramic headers, mufflers and 2.5" exhaust are going on in a few days.

It runs pretty strong out of gear but getting out on the road, it seems to bog down (even backfiring sometimes) if I get on it hard. I'm attributing this to the lack of the upgraded exhaust. The timing is around ten because twelve is too much when the vaccuum is put back to the advance.

One other question about setting the timing: I disconnected the vaccuum advance when I set the timing and I watched the timing mark move a lot when I gave it gas. Is that normal?

But if anyone has any tips for me or any place online that has good info, let me know. Thanks for the help.

Scotty B.