Byron Ill drag strip for vintage cars up to 1966   Vic Correnti Jim Cochran and i are usually the only Y blockers
I had my 57 tube chassis fiberglass T-bird. 333 Y block C-4. It runs low 11s high 10s.  I got in 5 runs  3 wins (all against scrubies) one loss to a 39 Ford sedan with a Cleveland and one single run. No breakage and car ran well and straight down the track. Track photographer captured a nice launch