dont worry my 1800cc 16v is running a stock prop and i drift in 2nd/3rd gear in the dry with clutch kicks rolling burn outs. and its all ok just make sure the prop is fitted rite.
thanks lee

Parts will hold better with NA engine as there's not as much torque involved, torque kills parts.. For example Half Time had B21 with ported head, KKK26 turbo (from S60R), Megasquirt etc.. and little gears in diff were blown to pieces when he floored it on 3rd at the highway ramp. Then he welded the diff and it held..

I also blew the small gears in the diff to bits, mine happened because the shaft and bearings/bushes they spin on wore away and the gears were able to move on them, at first it just acted like a LSD for a few thousand kays, then one of the gears wedged into the other a little too hard and smashed to pieces, a few of the teeth punching their way out the bottom of the diff courtesy of the crown wheel and letting all the oil out, probably should have stopped driving it aorund then, but drove it home anyway.