your adding a bunch of $ by going with a w series head,for a motor thats going for small hp...eddy perf rpm's will do easy!!! if ur lookin for a head that works great to 600 lift,why go crazy? here my old combo 340 stock block,0.60 over 4" crank,11.1 comp with a flat tappet cam 255/255 @ 588 lift...pretty simple 3200lb 3500 stall 4.30 gear on 28x10.5 there a 10sec pumpgas car