Got ripped off. Looking for a new idea for the inside of the engine. Stroker maybe?

The advantage of stroking is low speed HP which needs less gear stall and better street manners. Since torque is proportional to engine size most mid performers get around 1.2:1 torque to cid race engine can get higher.
Everything pretty much mathematical related. Using percentage differences can get you in the ballpark.
The quick and dirty way is the multiple old cid with (rpm/gear depends what your comparing) and divide by new cid. Eg... 225 x 5500 ÷ 240 = 5156 so your peak power and powerband moves down 344 rpm not much for the money and gearing would be 240 × 3.23 ÷ 225 = 3.45:1. So stroke would be similar to moving up a gear step.