main cap question

ok, i bought a 440 over the summer and it was missing 3 main caps .....but it is a good date code and an HP block and mega cheap so i bought it anyway despite the missing caps. (you all know i cant pass up something like that anyway)

so last night i had a friend show up at my house and he told me he found another 440 that was overheated and two of the cylinders are cracked ....basically the engine is junk ......he says i can have the caps since he knew my problem before and he is going to scrap the engine, so im thinking i can take the main caps from the junk engine and put them on my 440 to complete it.

can i do that? i can just transfer them with no issues right?