I'm gonna do an EFI swap on my '72 this winter. I know there were two different tanks on the early 2nd gen Camaros. Can someone tell me how to tell what I've got and explain the differences between the two? Also, I need a plan for the return line...I'd welcome any suggestions you might have. Note: I will not be spending $1000 on an EFI tank so don't bother with that suggestion. It's just not feasible for me. I am aware of the RobbMC products and might consider going that route though.