Remember these are rated at the powerhead, in 1985 the hp ratings were at the prop, about a 15% hp difference.
The towers of power came out in 90-115-125-135-140-150. They are great motors and not bad on fuel either. Making a lower hp model a higher hp model is tough, differences in carbs, intake, porting and exhaust. These can be found fairly easily, I know 2 guys that have about 20 top's around there shops.
They run crazy good, mass quantities of torque out of the hole!!!
A single 140 or 150 would work good on a V -20. But a pair of 150's would be crazy SWEET!!!
