My 70 road runner,has a stock bore 440,6bbl,with a 500cfm center carb,mopar 557 solid cam,1.6 Crane roller rocker's,eddy heads.A 8in PTC covertor(5000stall)with 4.10 gears and a 28.5/10.5x15 slick.Has run a best of 11.53@118. It weight's 3895.After we put the cage in it,a 590 cam and 4.88 gears it ran a 11.58@98. We had to short of a shock on it with s/s spring's.And I had to lift around half track.The cage weight at lease 200#.