Rapid flashing turn signals , both sides front and back

I have checked the bulbs and they are good

any ideas 

Thanks for your help it was tge flasher, i put the HD one it, works great.

Sounds like it's time for a new flasher. 

As Mark said above, it's likely the flasher relay. Your 1972 Corvette has a replaceable turn signal flasher relay. It's located behind the passenger side dash panel, near the radio, and is secured by a clip. You can typically access it by reaching under the lower edge of the dash. The relay is an electrical component that controls the blinking of the turn signals and is designed to be replaceable. 

You state the bulbs are good, but you dint say if(all of)) the signals actually worked. A bad ground could cause the bulbs to light, but they may be a little dim, and not flash properly. If all of the turn signals work properly, but just flash quicker than they should, then yes, it might be time to replace the flasher. Typically, if both sides have a speedy flash, it is a faulty flasher. Try it with the brake pressed, and see if that changes the speed....

Ill pick one up tomorrow, thanks

Ill get a flasher tomorrow, the bulbs all light good, thanks

You only have to post that once, we get it.  Also, if you want to respond to a particular post, hit the "Quote" button, not the "Reply" button.  That way we know who you are responding to.

There are a couple different flasher relays that fit these cars.  I would check the relay 1st.  There are very slow ones and medium speed ones and fast ones available at any parts store.  Fairly cheap too.  Find the speed that suits your liking, then simply change it.  Very simple plug in, and done.  

You say the bulbs are all good.  I assume you mean they all flash properly, they just flash fast.  There probably is nothing wrong with the flasher.  As others mentioned there are different speed flashers.  I bought my '73 in 1975 and still own it.  Throughout its entire life the flashers have flashed very fast. I always thought it was fine.  My power windows also open and close very fast.  Maybe my car just likes to do things quickly!

I replaced all the bulbs and they were not corroded , still fast.

i see a flasher in the fuse block, but cant see one under passenger side, is it near the radio, because i replaced my std heater ac with vintage and reallly cant see anything behind passenger dash, its really tight