best engine block year?

["Toby Atwater" <toby.1969ah.1971lc@worldnet.att.net>]

I know the 67 Spridgets are supposed to be the fastest... but what year 1275
would be ideal? The basic design is surly the same on most 1275s but I heard
that certain year blocks are better than others... what does the list say? I
know the later 1275s (70 onwards?) had smog pumps on em. Can all of the smog
stuff on a smoged 1275 become unsmoged... (removal smog pump, carb
alteration, etc)? Thanks

Toby
69 Sprite
71 Fj40