426-440 kit

[400exbilly]

Is there any piston kit inbetween a 426 kit and a 440kit and also if you have a 440 or a 426 kit is it better to run on alcohol or premium unleaded?

[Colby@C&DRacing]

Ross offers a 434 88.6mm

[underpowered]

a few companies offer like a 430 or 433 as a go-between for a 426 to a 440. JE and Ross both do, but they are not that popular.

[400exbilly]

Do they have an internet site or a phone #?