I'm curently restoring a mean&lean looking 77 celica GT lift backB)- with a stock 20R motor. I'd like to beef up her performance. I've found loads of great links to info on modifying 20R engines on this and other websites. Of particular interest to me were articles regarding the use of a 22R block with a 20R head which, included instructions for pistons, carbs, cam specs etc. However, i've still yet to find out the potential end result BHP of such conversions/modifications (ie. is it worth the bother or should i try and get an 18-RG?). I would also like to know if it would be possible to install a supercharger or CT-20 Turbo following such a mod? If anyone can be of assistance regarding any or all of these issues (other links or personal experiance) it would be greatly appreciated.-D Cheers!