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View Full Version : I need info on head castings quick!

fourtrax
08-01-2002, 02:14 PM
I just bought a 401 from someone that was fresh out of the machine shop with new heads. My problem is the casting numbers on each head are different one is a 3216090-1 and the other is a 3233344-1. The first number uses Chevy arms and the second uses AMC arms. Will there be a problem using two different heads on the same motor? Any help would be great!
fourtrax
08-02-2002, 01:10 AM
Anyone?
Jake_S
08-02-2002, 10:55 AM
Fourtrax, try asking on an AMC board. Those guys are diehard AMCer's, they' probably know the answer, or point you in the right direction.
Jake_S
jeepjake
08-02-2002, 12:11 PM
They could both be 401 heads, early and late.

The one that "looks" like it takes Chevy rockers is an older (pre-74) head that uses the AMC rockers that LOOK like chevy (but are different in a few ways and are 1.6 ratio).

The other head is probably a '74 or later that uses the non-adjustable boss mount style rocker. Both are useable, the adjustable rocker one is PREFERABLE (no having to shim the **** thing).
OBX-AUTOMOTIVE
08-02-2002, 01:38 PM
OK....THE 3233344 IS A 360 HEAD 1977-78....THE 3216090 IS A 401 HEAD 1971-76... :eek: smile.gif