engine struggling from 80 to 100

[95StocK50]

just put my 3.73's in and and i downshifted into 4th and ran it up to about 105 and it felt like it would not miss but skip a beat like the ac compressor kicked but i know that didn't happen.

i'm going to do a compression check in my motor and pull a spark plug to check that because i also just put a walbro 255 fp in.

thanks guys

nathan