I'm targeting DP class for my '73 2.0L and my motor is getting rebuilt. What's the largest piston/cylinders I can run and still be legal. Rules state...
"The block may be rebored no more than 0.0472” (1.2 mm) over
standard. US-produced six-cylinder and eight-cylinder engines
may be rebored no more than 0.060” (1.52 mm) over standard.
Alternate blocks which are of the same material and nominal dimensions
as standard are allowed. Critical dimensions for piston
engines are deck height, cylinder bore, cylinder spacing, vee angle,
and distance from crank centerline to cam centerline. Critical
dimensions for rotary engines are epitrochoidal curve, working
chamber volume, and eccentric shaft location."
The way I read it, I'm stuck with the OEM jugs - unless my math is wrong