Volvo Penta 3850935 3855695 Cobra SX Lower Unit Gearcase 1.66 1.97 4.3L V6 SX-M Crankshaft These are the standard size

These are the standard size pistons from the the Ford 302 V8 engine from likely before 1974

any information would be appreciated

We have performed a Heli-Coil repair on one of the holes for the thermostat housing

Unsure of application as searching the manuals leads me nowhere

Volvo Penta 3850935 3855695 Cobra SX Lower Unit Gearcase 1.66 1.97 4.3L V6 SX-M Crankshaft These are the standard sizePart Number(s) Included Volvo Penta OMC Joint Venture 3850935 3855695 Cobra SX Sterndrive Upper Gearcase Unit From a 4. 3L GL 1994 Model 17 27 Teeth For the Lower Gears (1. 66 & 1. 97 Ratios) General Application Compatibility So 1. 66 was stamped on the plate from the upper unit, but basically the uppers only came in 2 flavors and the lowers came in 5 flavors, 1. 66 reflected the "overall" ratio after combining the upper & lower, hopefully this guide