Pull the valve cover and watch for oil on the rocker shaft. Have a oil pressure gauge hooked up where you can see it, don't trust the dash gauge if its been setting the same amount of time. You can buy oil gauges pretty cheap and " T " them into the system.
I am assuming this is a 235 that uses the copper/brass line to feed the rockers? Those line plug over time, so it may never oil the top end, but a oil gauge will show pressure at the crank. Even when new, the pressure was low compared to a modern engine, so don't expect a lot out of it.
If the battery is good and the starter sounds good, no problem with priming a used engine this way. If you want add a extra quart or two of oil so the crank is setting
in it till you know the oil pump is working. At least the mains and rods would be covered in oil.
Joe
