All,
I need some help in decoding some BBC Heads and Block I got for free.........
Here we go....................
The first set of heads (oval port)
-Pass 3931068 C18 9 GM3T
-Pass 2964290 D27 70 GM9T
What are they???
The next set of heads came with the block also (oval port)
-Pass 336781 J11 73 GM 11T
-Pass 336781 J10 73 GM 12T
The Block (454 2 bolt main)
casting # on rear of block - 3999289 GM T12 Pass HI PERF
number on deck T1012CWX 46448613
I think that the heads and block may be from a 1973 or 74 Chevelle / Monte Carlo 245 HP via the chevelle books I have. The HI PERF casting in the rear of the block is throwing me for a loop. The CWX code can also be for a 1972 454 270HP for a Corvette. I need some assistance in figuring out what I have here.
I need some help in decoding some BBC Heads and Block I got for free.........
Here we go....................
The first set of heads (oval port)
-Pass 3931068 C18 9 GM3T
-Pass 2964290 D27 70 GM9T
What are they???
The next set of heads came with the block also (oval port)
-Pass 336781 J11 73 GM 11T
-Pass 336781 J10 73 GM 12T
The Block (454 2 bolt main)
casting # on rear of block - 3999289 GM T12 Pass HI PERF
number on deck T1012CWX 46448613
I think that the heads and block may be from a 1973 or 74 Chevelle / Monte Carlo 245 HP via the chevelle books I have. The HI PERF casting in the rear of the block is throwing me for a loop. The CWX code can also be for a 1972 454 270HP for a Corvette. I need some assistance in figuring out what I have here.