Im going to try the 1987 CR250 intake manifold with 1/4 reed spacer. Its the easiest fit, and will give me more room for the bigger 38mm pwk that is on the shelf!
Bronco I know ur on top of things but I'd pit a new plug in and plug chop make sure ur jottings right. My friend had the same problem due to jetting, air mixture adjustment and a bent carb needle