Those Jatcos can be tweaked to suit. A lot of guys are running them behind rotaries now as the early RX-7s came with basically the same Jatco as Datsuns. I don't really know anything about what can be done, how much etc, as it is not something that interests me, but if you are keen I can try and find out from people who do.
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green200b - aka Alistair
The fleet:
Australia:
'80 200B GX - the
green200b - hibernating
'81 RX-7 - 12A extend port - daily
'74 RX-2 - 13B bridgeport - cruiser
Europe:
'93 200SX - CA18DET - tourer
Green200B has forgotten more about 200Bs than we will ever know.