1998 T Cat 1000 In M Chassis 2003M Chassis ZR 900. Well got engine in with stock pipes also, Bit tight but doable. Had questions for the Sled Experts. Thundercat engines. For replacement pistons these wossner Pistons. Has anyone used them? Also who does good crank shaft work , Like crank rebuild and weld. I imagine its prudent to weld while getting it redone? or is this not necessary. The engine is stock. Thankyou Mike