I put bars on prime and bottom to aid the manifold and preserve everything in line. as they taper I'd ribs put on the end so a hose won't slip off. 4a. I'd state that it is most likely loaded at idle since the more air leaking thru the throttles https://claytonzeedd.blogsuperapp.com/35230721/the-ultimate-guide-to-4age-20v-for-sale