My guess is they charge the vendor which then needs to be added to the price. There is always money made somewhere with Finance. Anything "interest free" usually means the interest is actually on the sale price.

A pressure wash revealed 21R on the bell housing so that's what the gearbox is off I'd say.

Thanks for that. A bit more thinking to do but it looks like a cut and shut might be the best option.

I know a few others have done it but I've not seen a detailed right up on it. I can think of a bunch of things that could go wrong....

If you get one can measure how long between the faces for me?

Anyone recognise this bellhousing pattern? I'm not having much luck tracking down what toyota motor it fits. From there I hope to find a drawing of the pattern so I can design up an adapter....

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Just found this again http://datsun1200.com/modules/myalbum/photo.php?lid=25422, if I can find one for the box that's half the work done!

You're not wrong, it's hard to imagine an A15 ever breaking it regardless of how much extra air you pump into it! Should be bullet proof. Be interesting fitting it in the tunnel though. I might be after a bigger one.

Ideally the auto bell would be less than about 135mm that would leave enough room for an adaptor without any other additional parts, otherwise I may as well use what I have. Either a cut and shut or adaptor plate and an extra piece to move the spigot bearing.

Alloy case, w55-58, I'm not sure, bought it years ago. Alloy plate so an earlier one, counting ratios is apparently the only way to tell. I haven't done that yet.

I can post a pic if there's any Toyota buffs.

Cheers, I just did some rough measurements on the two boxes in the shed, the standard 4 speed has the input shaft protrude ~16mm from the bell housing. The W5x box has the input shaft shorter than the bell housing by ~3mm and the bell housing it's self is ~ 161mm long.

If/ when I get to it I can take the bell housing to work and measure it on the flat table with a height gauge. Concentricity is more critical though.