What radiator are you using for your hemi swap?

What radiator are you using for your hemi swap?

I've got a factory 26" radiator (was a 318 w/AC), and I was going to "upgrade" to an aluminum radiator with both necks on the passenger side. So far, I'm not liking my options.

Factory radiator: 26x18x2" cooling area, 29.125"x2.5"x23.75" outer dimensions. Bolts at 28" apart.

Aftermarket options:
Griffin 8-00038-LS - $275
22.5x18.6x2.75 cooling area, 26.5x18.5x3" outer dimensions. The hose connections are 1 1/4 & 1 1/2. I believe the Hemi is 1 3/4 on both? 1 1/4" tube size.

AFCO 80101NDP - $235
22.5x18.5x3", 27.5x20x3" outer dimensions. connections are 1 1/2 & 1 3/4. 1" tube size.

Griffin Custom radiator - $569
Will match the height and width of my 26" factory radiator. This is the way the rep was pushing me on the phone.

Griffin 1-58242-X - $312
22.5x19x2.5, 27.5x19x2.5 outer dimensions. connections are 1 1/2 & 1 3/4. 1.25" tube size. Rated to 600 hp.

Does anyone know if the mounting bolts are different for the factory 22" vs 26"? I'm trying to establish if the Griffin LS radiator will mount up for me. Further, does anyone know if Griffin has attached an HP rating to their Dominator radiator series (which is what the bolt on radiator is)?

Further, I don't want to spend more than $250 on a radiator. But, I'll be road racing my Duster, so I need a good radiator. My factory 26" radiator did fine with my street/strip 408, but I was assuming it wouldn't hold up to 20 minute road racing sessions.

The 5.7 is 11:1 forged .020 over, 223/227 on a 113, heads that flow ~360, 6.1 intake, etc. I have a TKO 600 behind it. We're looking for 500 crank hp.

Does anyone have any other radiator options out there? I'd love to hear what ya'll have done. And does anyone have a connection for a reasonably priced custom radiator?