"NOT" Like a glove

do you think the headers will go in with the motor or as im lowering it down pic the best time to bolt them on and should i dare try it with traney i dont mind putting trany on after motor is in the mounts headers are TTI 2" they dont make a 1 7/8 for the dart and i thought 1 3/4 was to small for 500hp what im i infor feel like a plan would be best