new rear shock

okay, firstly apologies as i know this topic will have been covered before, i just cant find th correct threads..

im looking to upgrade the shock on my pointy k6 to a gsxr one of a similar age, however when ive been searching old threads th common consensus seems to be that if you change the front end you need to change the shock too due to th extra weight over the rear - is this true in reverse as well?

im looking to replace springs, oil etc. in forks anyway, will this be enough?

any help or a point in the right direction for useful threads would be much appreciated thanks... mc_phers0n