dgc333 said

The Holley & Demon main bodies are not interchangeable. Even those bolts holding the bowls on are a larger diameter than Holley.

If you call BG their response will be send in and we will fix it and it will cost almost as much as a new one. They will not sell parts other than tuning parts. I tried to buy a main body to turn a 725 into a 650 and they refused to sell it to me. That's when I decided I won't be purchasing any more Barry Grant stuff.

They also make solid threaded inserts that you could use. Check out McMaster Carr.

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