The T50 toyota box has horrible ratios, 1st gear is non existent. For a modded bellhousing choice the 71 stumpy is the most available but the 60 series is plenty strong I agree, especially if there was a way to fit an oil cooler to it for endurance racing or some kind of sump attachment.

Interesting conversions to the GA16DE http://www.datman.co.uk/forum/viewtopic.php?f=12&t=5102

I would love a T5 with close ratio kit, to fit an A series you could use an auto bellhousing from an A series use a 5mm steel plate with 4 holes for the T5 to bolt on and tap the rest behind the A series Bellhousing. The T5 weighs 34kg in the long version and 32kg for the stumpy S-10 version. Almost as light as the T50 but close ratio gearsets are 1095 USD for any ratios. Would need front input shaft which is removable to be machined down to A series size and use a custom spline clutch plate. Auto bell needs hydro or cable clutch slave provisio. You can machine the bottom off box & use standard rear mount section where the green square in first pic or indicated with red line on bottom pic.

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  93 up S10 - T5.jpg (42.89 KB)