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Only 4 bolts per hole is the small block weakness IMO.

I thought about the elevation, I'm at sea level. More concerned about blowing head gaskets since I'm at 10.3:1. 93 pump gas works for me NA. E85 is not really available. I'm hoping a station starts carrying it on my 50 mile drive to the track. Very interesting thread, thanks for sharing.

How much boost is this thing making? I'm on the fence of getting one for my 340.

IMO you're gonna need a NHRA license and more safety equipment with the new motor.

Was any part of the head gasket over the edge of the cylinder wall allowing it to burn? Camera pics do funny things. I agree 4 bolts of the SBM is a weak area.

I broke an exhaust valve head and when that hyper piston shattered the wrist pin hammered two holes in the bore. No more chevy rockers and hyper pistons for me. I went back to LA motor and forged assembly.

Time for tear down. Broken piston or ring would be my guess. How much blow by is in the crankcase?

Glad to see you are getting dialed in! Enjoy the fun.

IC742-030 Icon Forged Dish Pistons 4.030 Bore Connecting Rods - Engine Parts | CNC Motorsports, On Sale Filter: On S

Did you get to run?

Nice upgrade! I've got to ask, how long do you expect the bottom end to hold together @10psi?

Clean up the bowls and open the pushrod pinch area if your going to use the magnum heads. Mine bowls had 90* walls where the seats are pressed in.