Mine is because I race dirttrack cars and my number is 7. I just added the 0 cause it looked better lol
my ole man used to race stock cars, (dirt/clay oval track, small town hillbilly type stuff..) his number was 70. lol
dnt know why.. just what he picked for some reason..
I dunno.. it was similar to 07 just thought id mention it..
old sam.. hehe
(the car had yosemite sam form loony toones painted onto the hood and trunk.. guns blazing at ya on the hood, n his drawers dropped mooning ya on the trunk..

)
then he rolled rolled it violently off number 1 turn.. ended up using a buick skylark to re-skin it.. the rear bumper made that thing invincible.. powder puff my aunt got rear ended, litteraly sheard off from the middle of the rad to the drivers front door post of the car that hit her.. tire, fender, bumper, engine parts.. all of it.. hehe
the re-arranged the letter Buick to say Cubic.. lol.. just for the heck of it.. haha
it had words welded into it under the hood on 2 spots where the cage connected "OH sh!t" and "HOLD ON!" haha
i miss ole sam.. lol
just guessin you race the same kinda dirt oval.. its the only kind i know, aside from a bit of sprint car stuff.. lol