Hey, I am in the process of this swap.
If you get a Rolla with a 4A-FE or 7A-FE, you are saving a heap of time (and money) as all the radiator and heater hoses are ready to roll. However you may run into issues with P/S and A/C locations, if you want to use your original lines for each.
If you want the SX cluster, you will need the SX dash loom to plug it up, or do some cut and shut with the plugs into the cluster. I have a cluster and loom, the loom I am using as a reference at the moment, but it will be for sale some point soon.
I purchased an engine and loom that came out of an AE92 SX, my problem is I'm putting it in a JDM AE92, so plugs are different, and other little bits and pieces I am finding out along the way, like the AE92 HP fuel line is less than ideal, and working out where to mount the coil, igniter etc. If I had my time again with it I would get the original engine loom and BT engine loom next to each other and combine the two - which I may do at some point.
I'd highly recommend a brake upgrade too, AT LEAST ventilateds up front. I can't recall if I have fronts (quite possibly!), but I do have rears, and the handbrake cable to suit, in the shed. They'd need a reco, but most brakes this age you'd want to reco anyway. And the strut brace is worth it's weight in gold, getting it into a non-SX/GTi AE92 involves drilling holes and getting some nuts in behind - ideally you'd weld them, but I have had them just bolted in without dramas in a car I had years ago. Your driveshafts will bolt up, or new ones will bolt in. If you get a half cut use the BT's gear shifter in the shifter housing of the AE92 - a huge improvement.
That's all I can think of at the moment! Hope that helps.
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