i've been thinkin about gettin one of these for my camaro or maybe for my truck. i was readin a build up of a ht383 in a magazine and they said with the longer stroke (3.8 compared to typical 3.750) it made 20% more torque compared to a regular 383 built with the same heads and cam.

I'm a little skeptical of that claim.

Here is an intersting article on a HT383 build-up. There are four parts to the article.

http://www.chevyhiperformance.com/techarticles/57841/