Hi Bill, Tom... nice day here in North Fl. ....Finally!!
Head port work depends... on the place and the AMOUNT of the port work!! Ported heads can be anything from a gasket match to a full blown job !! Bowl work and valve job .. to just a "lap the valves in", it goes on from there... Call a few shops up there in Or. and see what they want!! and you should be pretty specific !! Or you could get the above....cool?? Some times it is by the shop hour (45-75.00 @ hr), or they might have a basic price and go from there... There are a lot of sites that will help you make good power from the E7s by doing it your self.... but the power of ANY head can be improved thru proper port and bowl work!! Didnt help huh??? Here in Sunny ( well... today anyway) North Fl. a good intake and exhaust port job, with bowl work and a performance valve job, surface and assembled can be 500- to 700.00 just depending on what shop!! cool??