1975 Chevy Truck oil capacity

Engine problem
1975 Chevy Truck V8 Two Wheel Drive Automatic? Miles

Hi, I realize this is not a repair question but I have searched and read my manual and found no answers. I have an '86 305 V8 installed in my '75 Scottsdale, no oil cooler, and need to know for sure what the correct oil capacity is for the 305's. I've been told by the previous owner that he wasn't sure if the oil dip stick was the correct one for the motor. Thanks