For the piston with iron heads, something like the KB237 would be in the ballpark. Compression should be in lower 9's depending on the rest of the setup. Below is from Mancini. This would also work well with aluminum heads if you upgrade later.
440 - 88cc / 9.5 to 1 (Set of 8)
We stock STD. / .030 over, all other sizes need to be special ordered
SPECIFICATIONS Bore: 4.32 Rod Length: 6.768 Pin Diameter: 1.094
Stroke: 3.75 Comp. Ht: 2.067
Crank-to-Deck Clearance: 10.725 Weight Piston / Pin: 770 / 191
NOTES (HYPER) Zero deck clearance can be achieved. Best combination with closed chamber heads, if compression ratio works out for your conbination.
$329.95
KB237
SIZE: STD..20.30.40.60