I have never chased the most horsepower but rather have been interested in alternative methods to get a little better performance. A long time ago this was called hot rodding. In this pursuit I came across an old thread about a 1.7 sleeveless piston kit. There were issues as due to core shift the coolant passages were not centered between the cylinder walls. The wall cracked on one of the kit engines and that was the end of it. There were attempts at larger bores with wet sleeves that also had issues so the alternative has been the 1.8 Stroker. I have a Thumper TPR2 head and I know he has built some Tritec engines over the years including a 1.8 sleeved engine where the owner supplied the pistons. With Gainesville and Daytona being in northern Florida there are some high performance engine shops. Thumper knows one of them that happened to build some Swamp Rat engines for Don Garlits. I asked Thumper to build me a 1.8 sleeved engine and he used 81 mm JE Pistons, K1 rods and high strength ductile iron, some call them steel, not cast iron sleeves. The cylinders were sonic tested and the final piston size was determined. Calculations were performed and I was told 23 to 24 psi of boost would not be an issue. I now have 350 miles on this TP-1,8 engine and still tweaking the tune. I have a M62 supercharger and with the increased displacement the boost dropped from 18 to 15.5 PSI. The cost of the engine with a core is $4250.