what intake is this????????????????

If budget is a concern (and really when isn't it!!!), I'd bolt the fresh J heads and that intake on and not think twice about it! Save the X Heads for another build (which will also keep cost down, hell you could even sell your X Heads as they sit for a few extra bucks). Besides the amount you'd lose will the J heads and intake wouldn't even be noticeable.

I would've kept/used my X heads if I didn't have to clearance the push rod hole for my roller setup (I just couldn't see myself F-ing up a set, when I know someone could really use them. So I ended up with Eddy closed chamber heads).