!/4 mile is anyone's guess w/o traction and depending on your skill level. It could be anywhere from in the 9's to low 12's.
Pinning it in 5th with a stock height tire 150 corrected mph would put you at about 6500 rpms, with maybe 160 at 7K? I'd say you'll run out of gear and than aero much above that.
I would also seriously, seriously recommend fresh SYNTHETIC oil and filter and an oil cooler if you don't have one already. W/O an oil temp gauge, your top speed run may see an oil temp of 250-300 degrees.