As someone who commonly does things that neither me or anyone else has likely done before, main first thing I'll ask to anyone is do you have a fair amount of fabrication skills (definitely cutting metal & welding) and at least some tools & place to work? Also the perseverance to push forwards through difficult projects. If you then then move forwards with planning. I love to see different projects pop up AND get completed. Leaves a hole in my heart when I see em start & then disappear.
Second would be picking a feasible project , figuring a possible budget, and securing all the big ticket items before starting.
If you can make it that far, then there should be another major planning stage & getting what you can of small items & a plan of where from for things you can't prefab, such as custom length driveshaft, exhaust, etc. take into account ALL involved systems, fuel system & tank , electric, hydroboost or add on vacuum pump for braking, electrical,gauges, heavier suspension springs, etc. Leave no stones unturned. If you can get that far you now have pages upon pages of notes & exhausting hours of research done & should finally be ready to proceed.
Now to your particular project I have no info about that particular engine, but if a forward sump pan looks to be a big issue, cutting the firewall & setting engine rearward can be a more difficult but great option for not only clearance , but for distributing the extra weight. Trans tunnel will have to be modified to fit a diesel sized trans REGUARDLESS of engine position. You'll be fabbing a trans crossmember for sure.
The list goes on. A really good person may get such a swap fairly done in 50 to 100 hours, cold run into 200 hours. for an enthusiast , the reward is all at the end of the road.
Obviously you want something to use & keep for years. If diesel sounds too challenging, consider something like a modern LS series engine & trans.......