see you have raised port heads in the pic, look like victors or procomps. that`s going to make everything tighter -harder to do.I have an aftermarket front end under my 68 fastback, the throttle cable is a little problem by itself, the headers weren`t real bad w. no torsion bars, bought a set of used TTI`s off a member in wichitaw and straightened a couple of tubes out, they worked real well-just not a lot of room. hole in pass. fender for # 6 plug, # 5 is the worst, and it`s a ***** because of the steering column-right up against it all most. be careful, its easy to crossthread that one in the alum.head. the header install is bad enough for 1 guy (heavy when you 68 yrs.old w/ some physical hangovers from wrecks. the heater motor will have to 'go" w/ those heads,( put an aftermarket hotrod heater(small) in mine just for defrosters did u have dist. clearance issues? I had to do a lot of grinding on my procomp victors to get a f.a.st. 2.0 dist. in it, it`s a short one like a chevy. just drove it sat.for the first shakedown to see what needed attention. HANG IN THERE ,first time mine has seen daylight in 5 yrs. let me know if I can help w/ anything--------bob:coffee2: