The 413 I have has no numbers that I can see on the oil pan rail pad.. and the block had splash shields that prevented seeing casting numbers without removal.

The Dist pad is best source IMO. Mine is as follows HT413 (I'm still learning on this motor) I assume H=72 T=truck 413=413

Guy's info checks out on my 413 thick dampner and holley carb for a '72

Anyone have the stock compression hight on these 413 pistons? Sorry off topic

Current cars: 2000 Dak Quad Cab, 2012 Challenger,1970 Road Runner, 1994 Firehawk


1966 Coronet post sedan, 1988 Corvette, 2005 Magnum RT all SOLD

R70RUNNER<---VP Inland Empire Chapter of the MPM