Wait. Let's re-think this completely.
Elmer Keith knew a thing or two about big recoil. This is the guy that was hot-rodding the .44Spl back in the 1930s and eventually became known as the "father of the .44Magnum".
He was using modified Colt SAAs as his main platform until S&W reinforced the N-Frame years later.
One of his custom critters was the most widely copied custom SAA ever, the "number 5". And it's THAT grip that Ruger mostly copied for the "Bisley" model. If you go look at pictures of an original Colt Bisley or an authentic Italian replica, you'll realize the Ruger "Bisley" ain't original Colt at all.
The Ruger Bisley is what Linebaugh and Bowen and the other big-kaboom Ruger SA builders recommend for dealing with major recoil. It not only "rolls in the hand" slightly like a regular Blackhawk/Vaquero grip, it does so in a way that handles big recoil the best. And these guys are building 5-shot guns MORE potent than the .454Casull, with bone-stock factory Ruger "Bisley" grip frames.
Fine.
So what happens if we stick a Ruger Bisley grip on a Super Redhawk?
OK, it'll look funny. Granted. But...would it work?
Wouldn't be hard to do.
Take a Bisley grip frame and aftermarket *micarta* grips, grind the top area of the grip frame metal until the SRH's "stub" fits down inside where the mainspring would be on an SA, then put a light coat of lube on the SRH stub. Fill the entire grip frame innards with a strong epoxy like JB-Weld and let dry - the lube on the stub and bottom area of the SRH would prevent the glue from sticking to it, but the grip frame metal and side panels would now be a solid unit. Drill it for a second cross-pin screw that goes through the SRH stub, and presto - a Bisley SRH. You use Micarta so that it's strong enough that the whole thing will hold together under monster recoil - it's stronger than wood.
A Linebaugh Bisley SA conversion in .475Linebaugh is more potent than a .454 SRH, and weights about 10oz less than the SRH, yet recoil is in the same ballpark or even milder with the Linebaugh. (It's the Linebaugh LONGS based on the .357Maximum frame that have been breaking people's wrists.) Stick that grip on the heavier SRH, and I'll betcha you'll end up with...well, not a pussycat maybe, but manageable.
NOTE: if somebody tries this, watch for where the Bisley grip would be in relation to the trigger position on a factory Bisley gun, and keep that relationship the same over on the SRH. I suspect it matters, a lot.