AJ's Opinion; Just for you 318 streeters

My 273 bracket racer ran best of 12.72 with stock heads, and never broke out of low 13's with 2.02 valve 340 heads (probably a loss of compression for one thing).
Dib’s. I think you made a typo since a 2.02/1.60 configuration doesn’t fit a 273. Or your 318, not a 273….