47-55.1 Rear End Advice Needed

[Jbrenyo]

I am new to this forum and hopefully are not making a mistake posting this question here. My son purchased a newly built 1953 Chevy truck on a 118 inch S10 frame, with an LS1 from 2004. The rear end in the truck is from a 1998 S10 blazer, a 7.65. We are concerned that this rear end will not hold up to the torque and power of an LS1 and are looking to replace it. We know that we could have a Ford 8.8 fabbed up to work, but my question is, is there a GM rear end that could just bolt right in there without any significant modification? We would keep the same rear suspension and would like to have disc brakes in the rear as well.

Any thoughts/suggestions are most welcome. I'm sure that this will not be my only question. Thanks!