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Mount pump back at tank. Most all are push pumps not suck.

Pretty fancy for hardly being able to see it! Lol looks like something I would do. Anyways, nice job looks good and yes you can mill that off if you need to.

Can you return it and just get the correct valley pan?

I have done a couple of 572's, one with twin throttle bodies run by a Rich Nedbal Fast XFI and a stage V with twin AVS 650's. Both have their place but the carbed motor was a bunch cheaper. The EFI motor ended up making 843hp on pump gas and the carbed motor is goi g to the Dyno soon but should...

Compression heat may be the biggest factor. There are a million variables to understanding this and it has been a big debate for years.Compression testers will read differently due to temp,cranking speed etc. Forged pistons are way more forgiving then cast or hypereutectic.Detonate with those...

Torco? Is that one of their additives? If so that won't bring the octane up that much.Aluminum heads? 100 octane will be fine with aluminum heads.Put a little more octane in it if your going to race it but should be fine either way.Cast heads and a bunch of timing may be different... Listen for...

Used the kit.Set it up in the mill.Seemed to work ok.

4670 would be a 1971 Carb. 4144 would be 1970.Just different list numbers for the correct years that's all.Unless there is a different base plate for different vacuum lines on the 1971? 4144 would be jetted for the 390hp 440 according to Holley.