I acquired a 65 frame, which was ready to accept a BBC...the difference being in the front crossmember being dished out for the BBC extra length and the harmonic balancer and pulleys needed that clearance that the SBC didn't from 1964.
everything was acid stripped and was like new metal for painting and reassembly.
Also I was planning on making a drag car out of it at the time (mid-late 80's) so I built a L-88 replica engine from an original L-72 (425hp-427-4bolt main) 570/600 lift cam, 12.5:1 forged pistons, etc all the good stuff
When it came time to first fire the engine, it was discovered to have a cracked block....so that set me back to scrapping the BBC idea and going with a warmed up 327 that came w/ the car.
My thinking was the 550hp 427 would end up breaking the rear diff (there wasn't a great alternative at the time for strengthening them like there is now) also with only being able to put a 235 tire under the fender, traction seemed hopeless without cutting the glass and tubbing it also requiring more rear diff work. Remember this is about 1988 when this was going on, tire technology isn't what it is today.
later pics include starting the body work, replacing all 4 flared fenders with new panels...that is my 7 year old daughter helping me (she's 27 now!)
