Well my total cost of PI part was 800 for nice new shiney ported heads with supposedly only 30 drag passes on them. they had also just been freshened up (woo for modular depot classifieds they started out at 1400 but the guy was going to 4v so he wanted to geth rid of them) and scored an intake for 150. headchange kit was 120 or somewhere around there, and 190 for all the misc bolts and gaskets and stuff from a ford dealer. I forgot how much the perceys aluminum exhaust and stage 8's cost so i will say 200 which is probably high. so i spent 1460 ish.
Although that is for just the PI swap I spent a fair amount more more going with long tubes vrs o/r x-pipe and magnapack catback but it was deffinately worth it.
I know new PI heads are around 800 as well. So, depending on where you get stuff it can be cheaper.
On another note I thought about getting some used PI heads that needed some cleaning and such for 200, and I went to a speed shop by me to ask about getting them cleaned up, and they reccomended a valve job as well. So they quoted me at about 400 to hot tank and valve job. So I would have been looking at around 600 for that
Hope that helps.
