[Brian]

Blast, the biggest problem with fitting multi-carbs to early, pump in head engines, is generator/ waterpumps clearance. The easiest twin manifold to fit is one that allows stock generator mounting
What I've done is, using the front post of a generator, a short idler using a V8 gene pulley one end [that I can mount stock fan on], and another pulley out back that runs a separate belt to an alternator mounted off of a head. This second belt tucks in behind the waterpump