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Looking for advice on approximate cylinder head intake/exhaust flow reccomendations for my build: 340 block .40 over, 4.00 crank, 11:1@65cc pistons, [email protected] solid flat tappet, victor 340 intake, worked 950 Holley. Going into factory weight '71 Demon w/ss leafs, 4:30 gears, reverse manual auto...

From what I gather, the 915 J heads aren't going to flow much different than the eddys if machined properly so I've gone ahead and bought a pair for $300. They are untouched from factory out of a 71 360. Im in Australia and there aren't any machine shops that are familiar with what I need to do...

Does anyone have experience stroking a .40 over 340 with a 4.00 forged crankshaft, scat rods, 585 lift cam, Victor 340 intake, 11:1 Diamonds, worked 950 Holley, etc using ported J heads? What would be the HP limitation by using these? Only asking because I have the chance to save over $1k by...

My stock stroke 340 engine has a crack in 1 cylinder. I want to sleeve that cylinder and rebuild as a .040 over 500+ HP stroker but looking for advice first to see if It would be ok or if I would need an unsleeved block? I would feel safer going 60 over with an uncracked block than running a...

I need some seriously good advice. My 340 12.6:1 pro streeter was running fine for days and days after overheating but after not running for about 5 weeks I went to start it and it ran really rough like it had a fuel issue. When I finally did get it to fire it ran like it was on 5 cylinders and...