BBC into a 86 SWB

[68longhorn]

I have a 1986 C10 SWB with a 305/700R4 that is my daily driver. The motor is tired and a 305 so I'd like it to go. A friend has a 454 from a 80s Suburban for sale at a good price. What all is needed to swap in the 454? Will motor mounts, accesories, exhaust y pipe, etc bolt up? (I only ask about the exhaust because I need the install to look factory) Will the valve covers clear the A/C case? I've swapped plenty of small blocks but this woulb be my first big block so I need a little info.