TS block versus CT block

["Jerry Oliver" <slantws@Home.com>]

Hi everybody;
Looks like I'll have to replace the block on my TR4A.
I've purchased a TS block (mid 59 vintage- has replaceable cam bearings) and
am wondering if I can   use that block? Are there any internal or external
differences? Can the 83MM liners be bored out to accept my 86mm pistons?
Jerry Oliver, Olympia, WA