Replaced block on 88, machine shop cleaned and magnafluxed and assembled short block. finished assembly and started engine, at first got a couple of squirts at supply line for rocker arms, then nothing. blew air back thru oil line, didn.t help, put washer under spring on relief valve, got a couple of squirts, then nothing, oil gauge is showing good pressure at idle. Checked oil pump prior to assembly with electric drill, picked up oil immediately. On block previous to this one had to plumb external line from port on sid e of block to valve train thru cover. This block does not have that port in it. any suggestions?