Need some help. I have a 1974 ford v8 (302) stationwagon. I recently took out the tired c4 and replaced it with a c10. My problem is it is now changing gears late.
I'm getting plenty of suction from the intake manifold which is great. My thoughts are with the vacuum unit. C4 and c10 units are slightly different. C4 vacuum unit is hollow in the end. The c10 vacuum unit has a screw in the end which is wound out as far as possible before there is no tension left on the screw without actually removing it. I took the vacuum unit from the c4 and put it in the c10 and it dropped to 35 km.
Could I get some feedback please as to having the gears change much earlier.