got a 66 valiant looking for a slant 6 flywheel that fits will be at the monster mopar weekend norwalk,and the mopar nationals please pm prices thanks Dan
As far as I know, it's the same flywheel for both the slant and 273. The slant came standard with a 9.25 inch clutch; the 273 a 9.5 inch clutch.
EDIT: Get the Brewers true 10 inch clutch with the special pressure plate and mounting bolts. I bought one for my slant and it fits just fine and will give much increased holding power. Planning on the same thing for when I go into my 65 4 speed Barracuda.