Right front wheel grabs on dirt & gravel!

If you did not rebuild both front wheel cyclinders, or replace both, then that needs to be done. The left one may have some crud in it that makes it activate slower. Also, check the left vs right springs and make sure the left is adjusted the same. It all needs to be 100% the same between left and right, or one or the other will activate first and it'll pull. Then turn the drums if that does not do it.