Originally Posted by Chip

crank is stronger on the YB
Pistons are low comp and have clearance for the 16 valves
rods are different too


The cheapest way to aquire all the parts you need for the conversion would be to buy a cosworth engine, and then just use your block.

Is your reason for wanting to keep your pinto that you live in a country which doesnt allow you to change the engine block, or is it that you are delusional and think its a good idea compared to just buying a complete YB?