I have a solid B21FT in a 83 wreck and trashed B23F in a straight clean 91. Has anyone done a swap of a K-Jet engine into a LH 2.2 car. Yes, I would rather do a B23FT, but I have the B21FT here. Is there any big problems with the mechanical part. Will the B23f manifold, TB, sensors, etc swap to the B21FT allowing the LH 2.2 to work. Should I forget it and part the wreck out to finance a B23FT.

Thanks.

Oops B230F LH 2.4

I'm assuming it's a B230 not a B23 in your 91. If you want to put a turbo engine in the 91, you'll have to swap plenty of parts whether you go with a B230FT or a B21FT. Several components are different between the LH2.2 systems for the turbo & N/A motors, among other things the ECU and injectors (which also require a resistor pack) are not (supposedly) interchangeable. However, the B21FT is a rather more involved job to install. You'll need the main fuel pump, wiring harness, both ECUs (the CIS & the Lambda), the ignition, and fuel pump relay & its wiring. I think, in your position, I'd go for the B21FT. You've got the donor car right there, you have all the parts you'll need and it's just a matter of labor on your part. And the B21FT is, in my opinion, probably the best motor Volvo made. I have never killed one. I do have an ever-growing collection of broken B230F/FT rods - they're still great motors, just not as bulletproof & tolerant of abuse as the B21FT. And K-jet, once any bugs are worked out, is fantastically reliable even if it doesn't deliver the same mileage as LH.
-Chris