273 build ?????

With your combo I got:

E-4 114 hp and 300 lb/ft both @ 2000 rpm
325 hp@ 5500 rpm and 332 lb/ft @ 4000 rpm

#14202 99 hp and 260 lb/ft both at 2000 rpm
341 hp @ 6000 rpm and 321 lb/ft @ 5000 rpm

As you can see the #14202 has more peak hp at a higher (6000) rpm but the E-4 starts out with more hp and torque and has more peak torque at a lower
(usable) rpm. Hope this helps and thank MRVCorp for the video and the great sound of the Isky cam. That's the cam I'll install when I rebuild this winter.
toolmanmike