Recently bought this 66 chevelle:
Rebuilt 350 engine,I think original 275 hp, (can't read numbers) Bored 40 over,steel scat crank, Rod's resized, Northern overhaul kit, Performance Crane Cam, Crane push rod's & Rockers, Heads stock reworked, Crane Value Springs, Cam Degreed. Quadrajet 4 barrel.
Tranny is a TCI Turbo Street Fighter only three months old.
3.55 gears-Posi-trac
Headman Headers
Power Steering
Brake systems -three months old.
Tires-1 years old-T/A BF Goodrich
Wheels- Aluminum American Racing
Any guess what hp I am running? Anyone know a dyno-tne shop in St. Louis?

Probably about 215 rear wheel hp, should be good for high 14's at the drags at ~ 93 mph.

Thomas

too many unknowns to make a good guess. what casting # are the heads? without knowing anything about the cam it's pretty difficult to say. but i would think that any decent running 350 with headers and 3.55 gears should be good for some kind of 14 sec time slip. does it have an aftermarket stall convertor, or a stock one? with the right cam and convertor i would say it would be capable of some mid to high 13's even if the heads were nothing speicial.