4l80 is definitely beefier... but the first gear ratio is meh if memory serves. A properly built 60 with a good cooler can handle this rig... but an 80 is pretty bulletproof. Monster Transmission and Oregon Performance transmissions can hook you up with everything and some solid advice.
On another note.. whats the interior height in your Tiger?
Thanks. Doing some research it appears that to convert a 95 over to a 4l80e will require a new ECU, wiring, transmission cross member, torque converter, misc. pieces and parts plus a 4l80e tranny and labor. Total cost around $5K. I have a great transmission guy and will talk some more with him.
My 97 has the 4l80e with about 160k on it and it's been a great truck, so I can see the benefit, but the low gears in the 4l60e make a difference when crawling around....a real conundrum...and I'm a bit of a 90's, Chevy/GMC, "K" body nerd...
As for the inside, l'm 6'02" and can fully standup and walk around inside without bending over, so I'd say the inside is 6'04" at the bathroom and 6'05" at the galley/entry way.
I've had a number of campers and truck campers and truly have found this floor plan to be the most convenient of them all. It feels so much larger then it is. Overall the truck/camper is right at 19 feet and we drove this thing like it's a large family car. Good luck.