360 does not seem to be making power and is slow in the 1/8. Need help and/or suggestions

The recommendation has already been made to find out what jets the carb came with and put those back in. Learn to read a spark plug and use your trap speed to tune it thereafter. Also see what powervalve is in the primary metering block. Divide your cruise vacuum in half and the power valve should be close to that. This is a good starting point.