I recently aquired a 70 240z. I know it has been tinkered on and its not stock. It has an E31 head (I know there rare,any info would help) and an N42block (was told it was a 260, I think its a 280 with that identifyer). I know the head is good to have although I don't know why. And I think that N42 means its an L28 block. Am I right??? It also has a 4bb holly, would I be better off rebuilding some su's until I can throw a tripple webber set up on it???? I am new to this, this is a hand me down project from my dad and he is no longer around, so now I have questions!!! any info would be good!