Sizing up a trailer

I just picked up a 76' Martinique but need a better, bigger trailer than the #2 that is under it. I've located an inboard trailer that may work( #3's are hard to find). What I need to know is the distance from the center of the motor to the stern. Boat is over an hour away from me so I thought I'd ask. The trailer I am looking at is 6' from the axle to the end of the bunks. I assume a little bit of the engine forward of the axle is ok but wanted to make sure. I promise to get pics up of the Martinique when I can! Thanks! Steve