does anyone know how much power the stock rear end will handle? or know what to do to make it stronger/ better? i am doing a ls2 swap in my 89 tsi and do not know if it will handle it

I've had a no-start issue for the past few days. The car cranks fine, but I had no fuel pressure at all at the fuel rail, so I assumed my pump went bad. I got a new one, installed it and same thing, no pressure at all. I don't hear the pump prime, click, anything when the key is on. I run an FIP TB-pro 2R. What do I check/ look for in the wiring path to the pump? Thanks a lot!   Zack K.

Would like little or no play if possible. For my poor 87 lol .

Looking to buy a good 6 bolt passenger rear axel for my 88. LMK what you got and best price shipped to 70634.