Bigger carb ?s problems

[Hulpio]

Yeah more threads is always cool

Winzor brand 353 cylinder, well.
All ports are 1 mm closer to TDC.
Transfers size and direction definitely need some work. I'd say there is 15-20deg angle difference, 20% widening on the carb side would bring it closer to OEM. Less from the start and more from actual cylinder wall. About to pick up Duke's next...