You will need to change those. 3/8" spacers only raise the rear about 3/4". Stock height springs should clear. I was lowered half an inch, and went up 3/4" for 1/4" over stock height. These tires are 29.5" tall, and grow at speed. The tire height does help with traction though. Pushes my first gear shift from 35mph to 39mph too.
The 305/45R17 Street R would be a great option street/ strip and is one of our most popular drag tires. We've got them in stock ready to go as well.
Stock shocks. Is it unrealistic for me to expect to hook from at least 60mph on the street if I upgrade to Rs and beef up the rear suspension? Right now all I got is rear toe rods, vertical links, and cradle lock outs
Any experience with them in the rain? Would driving at say 30-40mph tops be possible in that case?
If you take it easy you should be fine if you get caught in a down pour but heavy rain they're not ideal since they're a radial.
Unrealistic, yeah for the most part. You're not going to be able to hammer it outright with that power; throttle actuation will be paramount. You're off to a good start with suspension; consider those other items I mentioned. Your rear alignment could very well be off and your bushings have likely seen better days. They weren't built for the task of holding that type of torque.
I hook at about 850RW from a dig with 315/50/17's if they are warmed up a little. Cold will spin a bit in first. From a 40 roll you should be golden with the 315's at 950RW. Keep rainy driving under 40 and you should be fine. It's a huge improvement over my 305/35/19 drag radials, which would spin in 5 gears.
