Good results, a mates engine made 373hp/375lbft on a T34 with a 2 bar spike, drives sooo well

As you mentioned diffs the best mod by a mile my mate did was fit a 3.9:1 cwp, they are no stronger so you would still need to sort out a ATB or get Bara to sort you something although my mates never broke his although he isn't into stunts or hard launches.

Top speed at the limiter is about 180mph, the only way I can describe the difference is like having another 40-50hp to use as it keeps the engine on song all the time.

Well worth doing as a next mod and its still very useable on any engine spec tbh if you do go for a bigger turbo in the future