will J heads work on a 318? And many many more questions.

I am not building this one to be a race car. I am however using a crower beast cam and I am debating on weather to use the Weiand Stealth or Edelbrock performer intake. I will be running duel 2.5 exhaust with an H pipe and a 904 with 3:23 gears. I am hoping for a dependable driver that I can have a little fun with. I have the J heads, so I figured I would use them.