i 've got an 81 camaro tube chassie 2300 - 2400 lbs. 4 link dana 60 410 gear power glide w/brake. injected methanol dart 360 heads. bowtie IV 10.2 deck, i still need a few components like cam, belt drive or gear drive.... i like to be able to run in the mid 8.'s and would like to get the best price on good parts. i'm not totaly against used parts. 4.375 .. have you had any problems with this combination? i heard that the longer the stroke, like over 4.5, the more stress there is on the pistons and cylinders along with clearance problems.. and do you think there will be that much differance in hp.