Ran the Datsun today at Irwindales 1/8 mile. Didn't blow any freeze plugs this time. Made three runs with a best of 7.86/85.3MPH with a 1.67 60foot. Not too bad considering the small BFG Drag radials shifting at a low 5500RPM. Got kicked off the track for too much smoke though.The C4 seems to be blowing Type F out of the overflow onto the exhaust.Shouldn't be too hard to fix unless it's exhaust smoke..