I would recommend the 4.25" stroke over the 4.5". It's just easier on the bearings, less piston speed, wrist pins aren't clear up in the rings, and easy to make 600hp.
Unlike the cast steel cranks all the forgings we've done have been excellent dating clear back to the first one we did when they became available. That particular engine is a 505, KRE high ports, solid roller and made 735hp on the dyno. In all these years it's had one set of rod bearings "rolled in", valves springs and a rocker arm upgrade.
I quit doing these engines a couple of years ago, but up till that time every forging we'd used was from Star Galaxy and spot on everyplace. Not sure what's out there now, but like many other parts it's likely they are all from the same source no matter who is marketing them here under their label......Cliff
__________________
If you can read this, thank a teacher. If you can read this in English, thank a Veteran!
https://cliffshighperformance.com/
73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile),
|