CONVERSIONS

["Steven Berno" <steven_berno@mail.cpms.com.au>]

HOWDY THERE
I WAS WONDERING IF SOMEONE COULD GIVE ME SOME ADVICE ON CONVERSIONS..
I HAVE A 64 ROADSTER WHICH IS BEING RESTORED,AND I WAS ASKING IS THERE ANY
OTHER ENGINE OPTION BESIDES THE 4CYLINDER OR THE ROVER 3.5 V8?
DUE TO WHERE I LIVE AND THE COST OF FUEL, I WAS
WONDERING IF AN EFI ENGINE IS SUITABLE,PROBABLY SOMETHING LIKE A  BUICK 
3.8LV6..
IS THIS A GOOD IDEA,THE ENGINE IS ONLY 18 POUNDS HEAVIER THAN THE 4 CYL & IS
FUEL EFFICIENT WHILE GIVING SOME DESCENT POWER AS WELL

PLEASE HELP