360 or 383?

906 heads flow 230/170 plus or minus 5 cfm. J heads flow 200/140 same spread. Stock unported. Potential for the big block heads is no comparison. Stock big blocks require no special parts to go fast. I've had both and still have 2 383's, no 360's. I like high winders, 383's are. On the flip side, it sounds like you are done with a nice 360. No installation hassles or new parts. I'm sure it will be fast when you get it sorted out. That sounds good to me.