Johnson, I drive a 68 Camaro 250 with HEI Clifford intake and headers also a Holly 4 barrel. This engine has over 160,000 miles. The second best thing Iv'e done is install a used 700r4. The cost of drive shortening ($125) and the aftermarket rear mounting bar($175) was well worth it. The low 1st gear really gets off the line, ans in OD I tach 2000 at 70 MPH. I kept my 3:08 rear so I could see if it would be a problem, so far so good. Check out bowtieoverdrives.com lot of good info there. Good luck Herb
