Help me with this argument!

RustyRatRod said

And intakes. And transmissions. I think the 904 is heavier. Don't some of the 273s have cast iron water pumps?

Click to expand...

All 273's came with cast iron water pumps...

The last year for the 273 was 1969 and the aluminum water pump came out in 1970... So all 273's had the cast iron water pump from the factory...

However you could convert them to the 70 and later set up if you wish....