i started to use a rover v8 for my engine ....... but gave up.
It fitted into the chassis but there wasnt alot of space to spare.
one of the main reasons that i decided to change engine was that the costs were starting to go through the roof. for example the sd1 bell housing cost me about £140, i bought my new engine, gearbox & propshaft for not much more than that.
i have now gone for a nice "simple" zetec install