Adding to what John said...
Chevy engine builders are normally baffled when they build an FE engine. They typically leave out an oil plug which causes 'no oil pressure'.
It's not that FE engines are so special, but they are different. That's why you need a mechanic who is VERY familiar with FE engines.
The 390 is identical to your 352 by looks. After careful inspection, you'll find the 390 has a larger bore and a stroke nearly 1/4" longer. 390s and 427s shared the same crankshaft.
Before installing ANY engine, take a few core plugs out and look inside. Then replace the core plugs with brass. - Dave