My old man had a 2.9 scorpio, sounded good with air filter off when you booted it! Reliable too. I agree, a series t.box is nicer than an lt230 in a series. But why use an lt77 and not an r380? Much better box and you could habr got a stubby fender obe and crammed an rv8 in
I looked into this, and even have the R380 gearbox sat on my garage floor next to a series box, the trouble is the complete thing is still ~100mm longer than a series box. By complete thing I refer to the following in that order:
Adaptor Plate
R380 stubby bell housing
R380
Ashcrofts adaptor plate
Series Transfer box
Remember there never was an R380 stubby bell housing for the V8 only the diesel so you still need the Philips Milner or similar adaptor plate, and a NA 2.5 Diesel clutch.
In effect the R380 (and LT77 for that matter) is like a series box with the overdrive, however on an R380 the overdrive is positioned between the gerbox and the transfer box, not after the transfer box as per the series set-up. This is where the troublesome 100mm comes from.
So you either have to move the engine forwards 100mm or cut 100mm out of the rear prop and add that 100mm to the front. On an 88" Landy, cutting 100mm out of the rear prop is not a great plan when you start looking at yoke angles. Moving a 4 cylinder or V8 (similar length) forward 100mm crashes with the radiator and no amount of moving things around clears this and the bonnet latch position.
There is a half way compromise that looks like it could work but it's a right ball ache. This is to cut 50mm out or the rear prop, add that to the front and move the engine forward 50mm. This set-up according to my tape measure looks like it could work, bit its dam tight and lots of work.
For me for the moment, the R380 can sit on my garage floor until I can think of a better way to get this set-up to work.