I’ve found a '71 XJ6 scavenged for parts. The engine is still available in rebuildable condition - supposedly. Compared to the E-Type, about the same, dime-a-dozen don’t bother, parts are made of unobtainium…? Is it possible to put a manual trans (Tremek or similar) behind it?
The engines are eminently rebuildable. You can buy adapter plates to fit a variety of other boxes; Supra, J5. You might need an original bell housing but hey, I have 3 spares.
I just wonder though whether, bang for your buck, the US V8 is a cheaper choice. I spend a minimum of AU$6k for machining on an XK engine.
Yes, I put a Chevy 350 in my '34 coupe a few years back. EVERYBODY puts the same engine in their rods. Once in a while an old-schooler shows up with a flathead. Pretty rare.
The puzzle, If I can solve it, is how to fit another 10 inches of engine up front. The tail is wagging the dog for now - on paper at least.