AHHHHHHHHHH!!!!!!!!!!!!!!! Sounds to me like your in the same boat i was arond november last year, I got sick of blowing diffs and axels, i thought i have to re-engineer the car arond the engine which is what i did, and i'm still doing!

Go the T-50 for sure! A-series boxs don't like too much boost, as you have found out! i would recomend a good quality clutch for it as well.

I found that you only really need to decompress the engine if you want to run big boost, i ran 8-10 psi for ages with no detonation problems, but that was through a carby. I recommend getting a good tune to get the EFI running perfectly, Espeically if its a daily driver.

How well did it go befor the clutch and diff gave way?

yer im just worried about how long will the motor last hoping someone can help me decide weather its gonna last with a nismo head gasket n arp studs or its gonna need the internals set up for turbo :? . im 50/50 atm on keep or sell has im getting a skyline in the next few weeks and they dont brake lol

wat to do wat to do

You have most of the stuff for a strong drive train.

im told motor is stock straight from a sunny with low k's and tap's the lines for the turbo and lost interest . i like the tune in it but not wantin to spend much on it has that is wat the utes for and i dont wanna be braking stuff allthe time

If you can stretch the budget a bit a Wolf 4D computer with hand controller will give you hugely more accurate fuel & ignition settings at more points in the rev range, also you can switch between race and road settings or make adjustments on the go.

Running 10psi without pinging I think the motor is decomp'ed allready, but a little bit more might make it safer to crank up the boost a bit.
Will need to be dyno'ed though for the fuel side of things.

Decomp = more boost or more reliability!

decomp = less power :(

Yeah, strong diff, gearbox, clutch etc and decomp the motor a bit.
Mike would know much more about it though.

lol do i ?