my low buck street and strip ride

Havent been on in a while and just caught the build. Gonna be one sick little sleeper. Wanted to go with W2's on my 360 build but aint in the budget so it looks like a port job on my J's or maybe a set of X's if I can get a good enough deal. W2 small blocks are some BBC eaters man. Not to change subject, but what would you consider fair for a set of unmolested X heads? Found two sets locally, just not sure after figuring in cost of rebuild and port work. Thanx for any and all help, and again props on the Dart!!:prayer: