Originally Posted by hammertime
A block isnt going to just gain you hp ? actually I think this block is more weight then your stock so you'd slow down there, the one point of comp I have found is worth slim to none on mine.
The blocks only way 168 pounds and better ring seal with the SHP block and clinder placement is better on the dart as well and the lifter bores that are right on the money compared to most GM blocks and if using a roller cam that is criticle.
Joe Sherman posted on speeedtalk that going from a 400 block to World block was a 30 horse gain over a stock block do a search on the site or PM him.