What have I got?

[GRTV8]

Driving me crazy.
Nothing on this box and ancillaries to tell me what this is. My thoughts its LT77 5spd
Definitely a Rover V8 bell housing as it was attached to a P6b
What to you buffs reckon Ive got?
I know its Leyland
Ive searched the gearbox and these are the only casting numbers.
the over stamped serial number is on the bottom by the bellhousing

 

[jp928]

LT77. AFAIK CL indicates originally on a Triumph, suffix B - same as the one I have just removed, replacing with a C. The fact that the serial is there and not on the flat cast pad says its early, difficult to get some parts. Lucky to get a bell housing, they are getting rare now.

 

[Baron von Marlon]

Yep CL indicates Triumph, ex TR7.