neither engine is connected to anything to make it run, how might I do that?

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1992 850i 6 speed
1991 M3 S54B32 swap
2007 328iT/6 RWD sport wagon
1987 325E 330iZHP engine swap
2004 Vespa 200GT
1976 W115 240D getting a much bigger engine. 5.5L
1997 R129 SL600 5AT

Given your circumstances, I would take a small brush and paint grease on the cam, it's not for real lube but for protection. Open the plug holes and glow plug holes and squirt a fair amount of oil in the cylinders.

I have a friend who has some very expernsive engines and he just fills the crankcase to the top with 30W oil after he has put oil in the cylinders, painted the cam and replaced the valve cover. He's toyiong with hooking a small pressure pump to one of the oil lines to pump grease everywhere. But he takes them 100% apart when he works on them, so he's not typical. Plus he has space and MONEY.

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Strelnik
Invest in America: Buy a Congressman!

1950 170SD
1951 Citroen 11BN
1953 Citroen 11BNF limo
1953 220a project
1959 180D
1960 190D
1960 Borgward Isabella TS 2dr
1983 240D daily driver
1983 380SL
1990 350SDL daily driver alt
3 x Citroen DS21M, down from 5
3 x Citroen 2CV, down from 6