Ok, I've figured out why I'm confused..... Thr block barb for the pulse line is in a different place on the new engine. On the old engine, it was on the front, so there was just a little 4" run from the carb to the block. On the new engine, it's on the rear side.
So I'll need to run a new line that will cross over from the mag carb's pulse barb to the block barb on the rear side. Not sure how I'll do that without the line rubbing on everything from here to there...... Suggestions?
Thx for your guys help!