With 138K miles on the engine you will be amazed what a fresh 3 angle valve job will do for torque. Adding a performance cam is good, but if the valves are leaking compression and the back side oof the valve covered in deposits you won't see the same perforamce increase as with a fresh valve job. Another item to consider is that the valve have an established wear pattern and adding a high lift cam will change that, if the valve stems have any gum build up the first time you fire it up they just might stick open. New valve springs are real good idea especially if you plan on cranking any rpm out. I have a TH350 short tail shaft here that is a good core.. just depends where you live if it makes sense to ship it. $75 takes it way.
