Engine priming issue

[jaywashburn]

Hello,fellow members,

seeking some insight on possible reasons I am having an "issue" while priming oiling system on my 350. Motor has been completely gone through by a professional local builder. It was then properly stored indoors for 2 years.
I am just now getting ready to break in cam on it.
I purchased a priming tool & spent about 4-5 minutes spinning the oil pump gear. I have good flow of oil coming from all pushrods on drivers side & but nothing from the passenger side. Also, I did crank the motor over briefly a couple of times during the process but again no flow of oil from pass side.
I have good oil pressure during priming (55 psi).
Could this just a case of not having the right priming tool ? I bought it on Ebay
(sleeved billet shaft). It supposed allow for oil to travel to heads.
Thanks