Thank you all again for keeping this post alive. I am planning on using the 300 as a beater until she dies, then for parts. Im not going to get the R200 done until the 300 untimely death. I believe yall that the WHP is too low for upgrading the dif. But sadly I had to get emergency work done on the 280z, I had crazy noise (poping) and waable coming from the front drive's side wheel. The machanic told me that it was the bearings and the lug nuts (the treads had worn completely down. So Im currently 1200 dollars down 600 to fix the bearing, oil change, smog, aliment, and nuts. Then another 600 for the 300zx.
So right now im still going to throw 1000 in the 300 for my daily driver while I get the 280 up to prefection (whatever that is)
Also thank you for the information about the haltech and LSD
I ment to say I have a high flow oil pump sorry for the misinformation.
Lastly Vegas is cool but the problem is high crime (car theifs) and super bad drivers everywhere lol
Edited:
Oh and Im going to the machanic to sure up the dif