How Big a Bore ?

["Henry Morrison" <dos_gusanos@msn.com>]

I am going to rebuild my TR3 engine and since all my friends with 1600 cc MGA 
engines have them punched out to 1900+ cc's, I am wondering how far beyond 87 
mm the TR block can go and what pistons someone else may have used to 
accomplish this..

                                         Regards Henry