I have been running the same pair of W2 heads for over 25 years , on 4 different engine combos based on 340s and a 360 and have been as fast as 10.40 in my Dart . Currently on my 367 ( 360 Magnum short block ) 10 -1 compression pump gas motor made 527 hp. and 467 tq. and has run 11.07 easily 10.90s with a little tuning but I run on a throttle stop to go 11.50s now . When I was building my other motor : 408 stroker , R3 block with Indy 360-1 heads , I originally bought another pair of W2 heads to use but my engine builder at the time talked me out of them and into the Indy heads , based on the rocker problems I have encountered with the Indy heads I really wish I would have went with the W2s instead.
