I am working on a grooms cake which is a 3-d replica of a tire. It is a 12" cake on a 16" board. I have chocolate tools, nuts bolts sparkplugs that will be randomly placed on the board and propped up against the tire. The bride wanted to add a VERY LONG inscription and I'm stuck where to put it so that it looks like it belongs in the design. Truthfully for replca cakes I pride myself on being super attentive to detail to try and have it not look like cake so I hate having to add an inscription anywhere!

What is very long?
I struggle with the same thing... you don't want to take away from the theme and the look of cake but still make it part of the cake.
Maybe you could make it look like a letter she left him with his 'stuff'. You could use fondant for the paper, draw thin blue lines, then write her long inscription with edible markers, then sign her name and X's and O's or something like that?

Can you place the inscription around the board close to the edge?

thanks for the help. I ended up including the inscription along hte border of the cake board.