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I had a stock 71 T. Was worn out in 1980 so I put 2.7 8.5 nickies for 2.515 ltr 40 webers, ssi, L/E cams and stock 32 mm intake/exhaust head. on a track it would pull with a stock 3.2. with weight differences I assumed about 175 crank hp. ran well and dependably. Never have figured out the exact cr with the 66 crank and the 90 pistons. If I had it over again I would like to have had cw crank and more compresion better heads but back in the early 80s you could get 8.5 RS at most. this lasted for 30 years until it was money shifted at mid ohio. btw the valves in these years are all the same intake and exhaust ports, cr, cams and higher redline because of counter weight cranks and breathing make the difference. best Henry
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