Hey Raque,
Funny, I owned a TR7 with a 351 Cleveland mounted in it. Same story, guy I bought it from put it in there himself. Of course, back then it was a lot easier to make stuff like that work (no computers to fool with). The Triumph I owned was so light it would whip around in a heartbeat with a little throttle - main reason I got rid of it.
I hope no one thought I was dogging the guy - just trying to inject some levity in there. I applaud anyone who has the time and compunction to do a major overhaul like an engine mod. It will be interesting to see who does it first (may have already been done and we just don't know about it).
-- Best, John