About 15 years ago I did a top end on an existing 340+.030 short that made those figures. X heads with 2.05/1.65, Serdi 5 angle valve job, my "Stage 2" porting, shelf grind Comp hydraulic, small tube headers, M1 intake. By weight & MPH it was around 460hp. Very fun package with a loose convertor and 4.30s on a 28" tire. But by the GenX & Millenial definitions not as streetable as the 4" combos. It's old-school fast.
