Thank You ddgonzal. I'm honestly very pleased to read this. I was afraid I might have had to cut out the tunnel out and duplicate an auto one for this to work. To be totally honest, I'm still exploring options with ratio's and reliability. I scarcely find info on how much abuse gearboxes themselves take. I realize the 63A is quite a bit heavier from the bakkie's 60-series, but I'm afraid the 60 won't last under the abuse I'll put it through. I am definitely going to supercharge the A15 once I've had enough fun with it in N/A form.
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On the subject of abuse, do you perhaps know if there's a way I can use the original H145 diff? I keep reading the original diff won't hold up, then again, others say not to underestimate it. I thought of ordering a new gear set and rebuilding it, maybe incorporating shims to even out the grab and wear on the CW&P. Apart from the fact that I'm struggling to find an H165 in good condition locally, the H145 is 10kg lighter, and significantly smaller.
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Thanks once again. Your input is taken with High regard

A15 works great with the 60 series transmission, such as fitted to the B140 bakkie.

The 63A was originally fitted to auto-size tunnels (B210 tunnels). Which is the same size as the 1200 auto tunnel. It may fit in a 1200 manual tunnel with some massaging.

Hey Gentlemen, I was thinking of acquiring a 63A tranny as I bought my GX with an A15, and I'm uncertain if it was an auto or a manual originally. The tranny's out.
- Anyone know what the height and with dimentions are of the manual or the auto tunnels? I'd like to know how much space I need to make the 63 work.
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Many Thanks
Liebonhardus