5.0 SO question...
Reply #2 –
-H.O cam......cheap through someone here or the Corral
-E-7 heads......from someone here or an EFI 5.0 pickup (cheap)
-Speed Density Stang computer (Ebay or the Corral....cheap)
-New timing chain
-Stang upper intake,t-body,and t-body spacer,and 19# injectors
-your exhaust pieces you mentioned above
-some gaskets
I think you could do the whole thing for a couple of hundred dollars easy if you take your time and really shop around for your parts.
I used E-6 heads for a while,and while they are not great,the car still ran super good with the other parts mentioned compared to the stock SO engine.
Go have fun
I have a stock Stang t-body I'll donate to your cause if you decide you want it.