Its38,
As an ex-bodybuilder, I had the same problem. I did not find anything ergogenic to combat the problem aside from continued cycling training. To this end, I would suggest you use mid gearing as those who suggest high cadence may not be use to the side effects of a bodybuilder's muscles spinning at high cadence.
1. they burn out easily
2. they blow up like ballons
I suggest you continue to ride mid to bigger gears. As you condition your muscles to do this cross training (cycling) you can start to introduce other cycling techniques and training.
For the time being, NO on an anti-pump supplement, YES on new training principles for your legs. Thereafter, you can look for supplements specific for your cycling performance.
Good luck big guy,
CatSpin