1968 Plymouth Valiant First Gen HEMI

"......Flat tops = truck motor! 7.5:1....."

Yep, that's what the casting numbers say. Like I said it's a builder. When people find out that 392 are harder to find and a lot more expensive when you do come across them they become more open to the smaller engines.

".....
probably do not want to hear it....but I would cash-in that pile at the local scrapper, buy a crate 408 Magnum, insert it into that lil' Dart and never look back.

just my humble opinion....yours can and may vary......"

Denny at some point I may wish I'd followed your advice, but not ready to throw in the towel yet.