hi ferm,
got a question! 350chevy 1986 vintage in my v20 has 1256 hours. when i got it sat for year or two got it running needed to replace exhaust manifold and exchangers still ran hot. so i figured salt water cooled motor of this vintage is clogged up in the block and head passages. sure enough i cleaned out block and found heads shot too. so i got heads off newer motor with top bolted valve covers. and changed the intake manifold. because of newer design bolt holes. put it together and ran awesome. buttt i have just a tad low oil pressure!! 22lbs at idle and 35- 40lbs running around 3500 rpm. or higher. no noise or nocks sounds perfect but since am pulling the motor out to clean bilge and touch up a stringer think i will check the rod and mains bearing. also do you think the oil pump should be changed. or should i leave good enough be? also put mechanical gauge on block to check pressure same reading as electric sender. what do you think thanks tommy