Hi folks, So, I am building a 455 to go into my 67 GS-400. TA 288-98H cam, full length headers, ported heads.......I am thinking it will be under 500 HP? My tranny is a stock Muncie 4 Speed. Am I ok in terms of strength? No drag racing, just street driving. Thanks.
Street driving you will be fine as long as nothing is already worn/broke/on the verge of failure in the transmission. The tires will spin before you break anything (the majority of the time anyway). Get it to hook on a sticky track and that'd be another story... My car made 540/570 and my m21 is surviving so far with just a mostly stock rebuild and a few minor upgrades. But it wouldn't live at the drag strip, hence why the car hasn't made a pass (yet).
