What motor to go with?

:rambo:I have a 71 dart with the 318 904 setup... I in no way plan on racing, doing quarter mile runs or anything more than just simple cruise and once and a while mess around. I have a couple options but bare with me I can keep the 318 go what .030 over throw the 360 Ported heads on it along with a cam and flat top pistons and get decent hp and keep car original (SORTA)
I also can get my hands on 360's and 440's for next to nothing but like I said just wanna do mild playin mostly cruisin...I don't risk my car for no man or woman lol love it to much. But I would lose the original badge.

The 904 is a fresh reuild and I also have a 8 3/4 rear going in it to...has headers and i beleive 2 1/2 or 2 3/4 duel exhuast

P/S This will be a winter build so isn't like I'm starting tomorrow...so think bout it set me straight...Intake and carb i haven't thot about yet it has 4barrel carb and intake on it Idk what intake.