71 DEMON - slant6/3 speed manual to RB/727 - Questions!

HadAHemi & SpeedThrills, thank you guys so very much for the info!!! i dont know the first thing about those motors and if id even wanna swap thing into the Demon. At least its a B-family motor so its not that bad, but i dont know if its worh it to have a 361" Big Block!!! first im gonna verify exactly what i got going on and decide from there. Again, thank you very very much, you guys rock!