ok for the the whole kit kaboodale, bottom end is rebuilt(4k twin row timing chain) got trigger happy chucked the reco 40 dcom carb & manifold on 30mm redline single weber manifold on 27mm 4k head, spat flames at me through carbie, rejetted now and appropriately jetted for base tune(aka 110% wet lol) just changing head due the port size(3mm step), manifold been deburred with dremel with cabide bit but 14mm difference between pushrods what would be best to use short(172mm) or long(186mm)?
P.S waiting on head gasket and manifold gaskets and head studs still