71 demon 340 tips?

Soooo..... yes snowballing. I've played this game before. I'd take some pics but at this point everything is covered with nasty sludge and nothing notable as of yet. However, the block is at the machine shop to get bored, the 318 heads will go on a 318 I have for another Duster, and I have a set of 360 heads that were ready to go for a 360 in another car that I think will work here, unless I do buy those 915's from crackedback. So much for keeping it on a budget. The block is original to the car as I hope the trans is. The seller , a neighbor, said his brother bought the car new with a 4 speed and a bench seat. That's what I'm putting back in, will check all the numbers and such when I move that way. Putting a 1973 318 Duster together to fund the thing now, the 318 heads will do more good on that one I think.