I'm looking to replace my old BF Drag Radials 255/50-16s..I'd like to go with a wider Mickey Thomson Street ET, I'm looking at going with the Mickey Street ETs in P315/45R 16".(27"x 12.5" x 16").I'm putting these on TA 16" cross lace rims..Will I have fitment issues??

The 315 ET Street is going to be way to wide for a 16x8...they would require a 10.5-11" wide wheel. Id look into the 275/45/16 Toyo TQ drag radials.

yeah, I spoke to Mickey Thompson Tech..they said the 315s def wont work on 16x8 rims, but the 295/50/16 will fit the rim just have to find out how they will tuck under the car now

I'd use the 255/50/16's. Tire looks really aggressive, I like it!

Thats the size of the BF Drag Radial i have on the car now.. After going back and forth I'll prob get that size in the MT Drag Radials . I prefer the 26" tire over a 28"

They should fit well. But my rears are 15x8 with a 3.5 BS. Off my Dad's 4th gen Monte SS. I currently have 275/60/15 which are a bit too tall to fit without adding more of those rubber spacer on the springs.