8 bolt small block crankshaft

check to see if the bolt holes are 7/16 thread or 1/2 thread...as the 8 bolt cranks used 1/2 threads. Also check to make sure all the holes are threaded as even the 6 bolt cranks have holes that are not threaded..

I had a 340 main 3.58 stroke billet MP crank with the P number stamped on it....bought it for 300 bucks..sold for 550...

none of the OEM cranks had 8 bolts...