A Body T56 Tunnel Mods

[Simmo]

Have seen what a few guy's have done on their swaps, but I after some specific info.

I'll be running a T56 and 9 inch with a reasonable amount of drop, my question is how much tunnel clearance/raising is required in the rear section underneath the rear seat (smugglers box in the ElCo). I've seen guys with GM rear ends raise it, I'm wondering if I'll get away with leaving it stock with the lower 9 inch pinion height.

I want to nail the driveline angles as a priority as opposed to caring about cutting it up, I'm also trying to fit my fuel tank in there (the smugglers box) so less of a hump would be good...

...although that's a good excuse for a Vapourworx dual pick-up set up

any thoughts/advice appreciated.