I put a 1986 488 Trail Indy engine into a 1991 440 Sport GT chassis and into a 1994 440 Super Sport Chassis. The only issue was that the 488 engine pulled a P-85 drive system while the 440's drove a P-90 drive system, the two drive systems are not the same. So, put the P-90 drive clutch from the 440 on the 488 engine. Also, we found that the 440 pipes worked. Our 488 engine used its carbs, not the 440's - a bit different. Have fun the swap is doable.