Re: advice

Lots of Spitfires running around quite successfully with 1500's.  That's also
probably the best place to go looking for information on hopping them up, 
probably
starting with the Triumph 1500 Competition Prep Manual.

Biggest "defect" if you will of the 1500, imo, is the driver.  It's a three 
bearing
four cylinder, so don't over rev it!  Yet owners regularly over rev the heck 
out of
it, and then complain when it breaks.