Yes, I have a dial bore gauge and mics’.
Haha, roadkill was driving the 318 offroad challenger in a rock storm on 87 octane and found it to have 7:1 compression when they pulled the engine apart.

Just spent over $800 for a carb conversion and EV hat from HP Innovations.
Committed to e85 now.

Do you think 8.5:1 would work with e85 if I milled the heads only?

I don’t like the fact I can’t let it sit for more than 2 weeks but it is cool to be forced to drive it regularly when it finally gets done. lol