401 torgue converter
I have a problem,I went from a 360 to 401(72-79?)in a 85
J-20...the flexplate is different, I'm sure of that. What I'm wondering about before I put the right one on, is the torque converter (some have balancers) also need to be changed? I hope someone knows so I don't have to pull it twice. I also wonder about the ports on the exhaust manifolds, even though they bolt up OK is it really correct?