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I'll run the vacuum test this weekend and see where it is for sure now, I was wanting to do headwork but not sure what I'd be able to do and keep that vacuum. Is that something the machinist would be capable of figuring out?

The reason for 15" at 1000RPMs is the class in which I'll be pulling that is one of the limitations of the engine, it's a "factory stock" class that's running trucks with over 500 horse I'm just trying to be a little more competitive. As for the engine it's out of a 76 champion motor home, it's...

I was wondering if they or someone like summit would be the way to go

Ok I'm not 100% sure this is the correct area to post this in but I'm going for it. I have a 440 that I'm building for a pulling truck and I need to be able to make as much power as possible while creating 15" of vacuum at 1000RPMs. Is there any sort of mathematical way of figuring this before...