between my brother and brother-inlaw and mine.... we have 3 vega's.....
i was the only one that was running hot and tried the same stuff you did!! it turned out to be under jetted by quite a bit... even thought the motor pulled the whole way down and the "plugs" never showed any sign of being lean. i was running 200 to 220ish at the end of the track.... so i started jetting it this weekend and it not only got faster though the traps but my 60' footers dropped and my temps were 180 thought the traps now