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Hi everyone! I am mapping out a 360->408 stroker build in Denver CO at 5500 feet. I have been playing around with Dynosim6 and the max horsepower I can seem to get at that altitude is ~450 HP naturally aspirated. Has anyone built any 500+ HP naturally aspirated small blocks at altitudes this...

I am wondering if anyone has used the Kinsler SB Mopar intakes on their A-bodies. I am mapping out a build of a 408 for a Plymouth Duster and am curious what challenges people have had with ITBs. How are hood clearances? (I am thinking I would have to 3D print ram tubes to make it work) How does...

Hi Everyone! I just picked up a LA 360 block for $400 (hopefully I didn't over pay too much). After getting it home I noticed that there are 2-3 holes drilled into some of the main bearing oil holes. Is this stock or did someone drill into it? If this is not stock how will it effect the blocks...

Hi All, I have a 318 in a 1975 Duster with the following specs: 10.3:1 static compression, 4 barrel dual plane air gap intake, Clevite hydraulic flat cam w/226 duration and 0.453 valve lift, headers, edelbrock carb, stock bottom end, some head work I did on my own, and at 5200 ft in elevation. I...