To you guys that know alot please read

[oldhemiguy]

I have six good kelloge crankshafts have a new block 4.5 bore want to do a stock crank and 4.5 bore have a 68 barracuda and 71 challanger done right but leaf springs will go in ether i'm 72 last motor I'll probly build we are talking Hemi would you use the cranks I have or buy new I know let the next guy to 528

 

[33 IMP]

I'm 73.
I'd build the 540, if I didn't have cranks already. (4.25 crank).
But you do. I'd absolutely use a 3.75 Kellog if it passes mag. 477 inches.
Pretty sure custom pistons required, either way.

 

[pnora]

I have six good kelloge crankshafts have a new block 4.5 bore want to do a stock crank and 4.5 bore have a 68 barracuda and 71 challanger done right but leaf springs will go in ether i'm 72 last motor I'll probly build we are talking Hemi would you use the cranks I have or buy new I know let the next guy to 528

If the crank mags and is not a fuel crank you could go for it. Thing by the time you separately get the rods and pistons you might be able to buy a nice balanced rotating kit. Then sell off what you most likely will not use. What heads and valve train do you have?

 

[33 IMP]

Looks like if you want a shelf piston for a 4.505 bore, they are all for 4.15 stroke, a 528.
The 477 pistons I found are the wrong bore/stroke.

 

[INTMD8]

What is the history of the cranks? (any possible cracking/damage) If CCW and known good I would use but also like rpm.

Maybe could offset grind? Any goals? (hp, max rpm?)