I stand corrected... I only found one 3.75 stroke crank and it was from Ohio Crankshafts....
4340 forged Pontiac crankshaft 3.75 stroke with 3.00 main Pontiac journal $ 625.00 (yup...pricey!!!!)
1967 Firebird 400/4spd all numbers matching 1971 Camaro Pro ET Drag Car 1970 Camaro real Z-28 (needs everything) 1963 Impala 409 dual quad 4 spd 2003 Victory Vegas 2009 Pontiac G8 GT (My wife says I have a problem.....)