1934 Ford flathead need new oil pump advice

[cas3]

if your engine is new and clean, i'd run detergent oil to keep it that way. non detergent is used to keep all the crap stuck all over an old motor in place, not loosened up by the detergent. sorry, i cant help on the pump, but lots of smart folks here, some one will help

[Bluebell]

I would leave the stp out until she is run in. The zddp can be found in other oils. I'd suggest a non synthetic for run in. All just my opinion.