Yep uni's ?? check that they are central or in the middle of the carrier,maybe mismatch in the parts,bent drive shaft?
Balancing is important and not that expensive compared to damage that can be done..
Don't be afraid to try something new. Remember, amateurs built the Ark...Professionals built the Titanic!
Tuned & maintained by "Peppertree Perfmormance". Dart block, Scat 4340 steel crank, Custom C.P pistons.Oliver rods.. Mal Wood twin plate clutch.. Twin SC61/2's,482 rwkw/ 645 rwhp..
Passengers, myocardial infarction material..