thanks Nick, this will help me to understand
BTW, your idea to upgrade you engine is not so impossible, in an other life we did it with Porsche engine and also with a Jag, but it's in a different ERA where doesn't have so many electronics that's the first
the second is you should have strong mechanic base, and almost don't rely on any garage for do it otherwise it will be costly and probably disappointing
if your car have something really special go ahead but be ready to shake your head against the wall
