i just got my TR last night, its a weiand 5987 stage2. no cracks,mods,stripped holes etc. looks real good. when you look into the tops you can see where the upper meets the lower. there is a step there. like the lower openings need to be ported. is that a MUST DO? have you seen it worth 20 horse on the dyno? if i can leave it thats ok. stock stroke 440, 4800stall 6500rpm tell me anything you know of the history about the stage2.. any good?