Andy's example is pushing close to 700 NA...boosted combinations are generally slightly more forgiving than NA, but power potential increases ALOT...

Stock blocks are safe to 700 or so, see the most recent girdle thread:

https://board.moparts.org/ubbthreads/ubbt...tml#Post1990062

The general consensus is if you think you need a girdle, you might as well step up to an aftermarket block.


Faster, Faster until the thrill of speed overcomes the fear of death...

71 Swinger - slowly collecting dust/parts
66 Belv. II - just a streetcar
88 Mustang - turbo LS beater