MOPAROFFICIAL
Oogliboogli
Just build a cast crank 318, 6,000 rpm ain't **** for any amount of frequency.
Forged pistons are lighter than stock, use a set floating pin /bushed 340 rods for insurance. The cast crank isnt a problem, the skinny rods might be, hence the 340 rod insurance ...its the main caps imo, they are the weakest of all, still designed around a 273's limited power potential and little pistons. The front main caps have been known to crack under very extreme circumstances back when.. That may never be an issue these days, tighter balance, lighter parts...dampeners... maybe a hair better than a late 70's race version.
Just make sure all oil passages are sized correctly and not under, like many, and go full groove "hard bearings", as my friend always said..lol no soft dirt forgiving ****.
Forged pistons are lighter than stock, use a set floating pin /bushed 340 rods for insurance. The cast crank isnt a problem, the skinny rods might be, hence the 340 rod insurance ...its the main caps imo, they are the weakest of all, still designed around a 273's limited power potential and little pistons. The front main caps have been known to crack under very extreme circumstances back when.. That may never be an issue these days, tighter balance, lighter parts...dampeners... maybe a hair better than a late 70's race version.
Just make sure all oil passages are sized correctly and not under, like many, and go full groove "hard bearings", as my friend always said..lol no soft dirt forgiving ****.