Took my car out today and it ran real bad,when going up hill's there was no power and made a real rattle noise, the exhaust sounded like it was blowing when you accelerate,it ran fine yesterday,any ideas what could be happening

We need more information about your engine setup.

sorry ,it's a 1.7 on duael carbs

Then my guess is a clogged jet.

when i took it out yesterday going up hill i put my foot down and gave it a bit of a thrashing could this be connected,feels like theres no compression ,but thats me just guessing

Where did you find a hill? Do a leak down/compression test or inspect the plugs if you suspect a compression issue.

You may want to start with the basics... Valve adjustment and timing/dwell.