what yr n model one piece drive shaft can i fit on my 65 gmc

[Old_1965_Gmc]

Sup everyone been a while I ain't been bac on here lol...well I was wondering if anyone could help me out with this one well I wanna go with a one peice drive shaft on my 65 longbed gmc I seen a few mid 70's n 80's chevy gmc n sum dodge trucks with a one peice shaft but I ain't sure if any will fit sence I still got tha 305v6 running n a 80's rear end from a chevy has any done this will there be any modifications i would need to do.... I would love to see sum pics n everyone thoughts n comment about it thanks for tha help everyone
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