by 70 340 » 27 Jan 2007 13:40
Thanks for your replys. Yes I do know that the bottom end construction in a T/A block is different. I just would like to know how to identify one by the numbers. I got a book called challenger and barracuda restoration guide 1967-1974 and found the answer i was after
340ci 4 bbl casting numbers 2780930-340
340ci 3x2-bbl casting numbers 3577130TA
If the letter S or the letters H P follow the displacement code, this denotes a high performance block. That is what the book comes up with.