I don't really like posting a new thread that may or may not go anywhere, but I can't/haven't found much info on this subject, here, or anywhere else. From what I've been able to gather, the AJ34S came in both the S-Type, XJR, and XKR, from about 98 to the present. When they first hit the market, they were 4.0L then later were bumped up to 4.2L. I've been all over the board on trying to compile a list of possible engines, and won't likely settle in on any one style or brand until I actually happen across a decent engine at the right time. I know I want to go with an aluminum block to keep the weight down, and I'm pretty sure this engine is. I know anything is possible, so I'm pretty sure that this engine would fit under the hood of an S30 without much fabrication, since it's around the same size as the VH45 and 1/3UZ V8s that I'm noticing more folks using for their swaps. My biggest concern, actually, is finding a manual transmission for the swap. The only other question I've got, is how labor intensive are Jaguar engines regarding maintenance and reliability?