You have the 32" tall slicks, therefore you can make the 1/4 mile. When I was running the M&H Drag Radials (29.5" tall) and I was going through the lights at over 6,000 rpm (118 mph, and I have 4.56's) so it would have been impossible for me to run 4.88's. Most guys on here will not shave the calipers and therefore are stuck with using a 17" wheel in the back and there are no acceptable tires other than the 390-40-17 M&H's. So don't say people that have never run them have no experience, I think I know what I'm talking about. If he stays with the stock tires then he would probably be OK for the 4.88,s, but he will have no traction.