It would be better to use a little longer connecting rod than stock.
It reduces side loading and the piston can be a little shorter and lighter.
The aftermarket 6.00" longer Chevy 250 six rod can be made to work nicely with a custom piston.
http://www.summitracing.com/parts/sca-66000206.
The big end will need to be narrowed by .056" to fit the 250 crank.
Since the Ford rod journal is 2.123" and the Chevy six is 2.00" you have the option to offset grind the crank rod journal and increase the stroke.
Even if the crank needs to be tuned .020" to clean up the journal surface, the center can be offset .050" to gain .100" stroke
We use Diamond pistons in our racing engines and they will make you what you need.
It reduces side loading and the piston can be a little shorter and lighter.
The aftermarket 6.00" longer Chevy 250 six rod can be made to work nicely with a custom piston.
http://www.summitracing.com/parts/sca-66000206.
The big end will need to be narrowed by .056" to fit the 250 crank.
Since the Ford rod journal is 2.123" and the Chevy six is 2.00" you have the option to offset grind the crank rod journal and increase the stroke.
Even if the crank needs to be tuned .020" to clean up the journal surface, the center can be offset .050" to gain .100" stroke
We use Diamond pistons in our racing engines and they will make you what you need.