sblake01 Posted January 24, 2008 Share #13 Posted January 24, 2008 ENGINE CASTING CODE L24 (1970 240Z) # E31 (flattop pistons) L24 ('71-73 240Z) # P30 (flattop pistons) L26 ('74 260Z) # P30 (flattop pistons) L28 ('75-80 280Z) # N42 (dished pistons) L28 ('81-83 280ZX) # F54 (flattop/dished pistons, siamesed cylinders)1970 through 1976 heads have square exhaust ports (E31, E88, N42) 1977-'83 heads use rounder, diamond shaped exhaust ports (N47, P79) 1981-'83 turbo heads have square exhaust ports (P90,P90a)If you put those two lists together with information in the link in post #2 http://www.zhome.com/ZCMnL/tech/head.htm you can match up the years of each head with the blocks and get a little more info on each head. Bear in mind that this is for U.S. models. I know the model lineup differed a bit in Australia. Link to comment Share on other sites More sharing options...
balaguy Posted January 24, 2008 Author Share #14 Posted January 24, 2008 sblake01your an animal!!! Link to comment Share on other sites More sharing options...
idolizar Posted January 24, 2008 Share #15 Posted January 24, 2008 thanks heapz bro thats made it heapz easyer Link to comment Share on other sites More sharing options...
EuroDat
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