Senior Tech Team
Join Date: Dec 2004
Location: Calvert County, Maryland
Aluminum heads 3946074
My brother in law is working on a big block for a customer and the heads are as stated above, but they have a casting date of 6 20 70. My guess is they were service replacement heads for the L88 or ZL1.
Also, on the front of the head it is stamped 1476799. Maybe this is the partial VIN from the engine the heads were put on and the engine builder stamped them.
ACES # 6575
MCC # 643
1970 L78, Red on Red, 4 spd
1970 LS6, Misty Turquoise on Black, 4 spd
1970 L34, Black on Black, 4 spd