[Andrew429]

Hi Dave,

It looks like alot of this has been said already, but here goes.
A 3550 will be fine behind a 302.
The gearing will be better suited to a slightly shorter diff ratio, however if it's going to be used for cruising I wouldn't get stressed about it.
The fit will be easy as this used to be a common box in these kits. I've got a TKO (identical outside dimensions) that is essentially the same except for some upgraded bits - this fits without mods.
$2000 sounds like good value, A TKO goes for around $3700 - $4000.
Hope this helps.

Cheers

Andrew