The 413 industrial and motorhome motors have a really good quality forge steel crankshaft and decent forged steel rods, I've used several of those blocks with those cranks in my old NHRA Max wedge stocker up I bored them to 4.250 and 4.270 and let them eat.
I have one now that was out of a 1972 truck that I put a Mopar 4.150 stroke crankshaft in it and had it bored to 4.250, a set of 7.100 long h beam rods, AutoTech pistons and a set of 440 source aluminum heads, I built it for my 1963 Fury street car. I will "allude" that it was low compression truck motor that runs really good devil stirthepot

Last edited by Cab_Burge; 12/26/21 02:24 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)