how much do i raise my floor??

i have a 54 belair, i already notched my frame, i removed a few springs and put 3 inch blocks. my drive shaft is hitting my floor, i havent bagged it yet (funds are low)but i wanna drive it already. i figured i might as well raise my driveshaft tunnel sience i know im gonna have to anyways. how many inches should i raise it??
thanks guys

 

You wont know for sure until you cut the tunnel out. I'd say you want at least three inches of clearence between the floor and the drive shaft...

 

i do plan to lay frame and figured i could cut it the tunnel out and lay it and know how much but i know a lot of guys here have rockstar chevys and already raised there floors so they know how much to do it.
still thanks zombie hot rod

 

Btt. Does anyone have pics of the tunnels you've fab'd? I'm in the same boat. Thanks.

 

Depending on where and how bad it's rubbing might be a lot cheaper and less aggravation to install a smaller diameter drive shaft.....

 

every car will be different.

I think I'd cut the tunnel out, undo the rear from the springs and drop the ch***is down on it if that is how low you want to be eventually. then build the tunnel to fit at maximum drop.

 

I will try to get some pix of my buddy's 53 I did. It was already tunneled when I got hold of it, but it only had a baby C-notch. Just a word of advice with the small "C"..... It WILL buckle your quarter panels if your drive it and it is bottoming out. We had to go through and finish out the quarters AGAIN after we finished notching it. I think there was a body mount right there where the notch goes.....

The thing lays frame on 17" Diamondback whitewalls. I had to rework the wheelwells all the way up to the pockets for the windows. Also, bent the 4-link to clear the floor, rather than hacking the floor out. I HATE that ****!!!