What is the highest compression you can go on stock rods? Just curious. If you *must* know, I'm thinking turning a 305 (cuz I got it) into an ethanol only (or e85) burner. I've got it in my truck and just need to get the pennies together to build the 355. This isn't a question of whether e-85 is a good idea or not, this is just for a possible low buck project to see if I can do it or not. I'll probably ending up making my own alcohol fuel for it. I'm thinking 12-13:1 compression and getting what else I need with ignition timing. Would cast iron heads be ok or would I have to coat them. What carbs would be good to use? I see edelbrock is making a new e-85 carb but with the budget in mind i may hit the swap meet for a used carb that could work. Thanks guys!