Ayrshire to Dundee

Nope, just checked, this is the one, although the previous route would be nice too!

http://www.mapmyride.com/routes/view/130677935

Found it I think.

http://www.mapmyride.com/routes/view/118236727

I find most of the back roads in Renfrewshire to be pretty cycle friendly, probably because there's a fair few cyclists on the roads. Alternatively you can trust the cycle network which is pretty good. Personally, I would probably use route 7 to get to Bridge of Weir, go through Houston, Bishopton, across the Erskine Bridge to Milngavie then on from there. I'll check if I created the rest of the route on mapmyride and post it if I did.

Gman59c, do you want the most direct route, or a more scenic route. I planned a 200k audax from Renfrewhire to St Andrews last year that I think worked pretty well. Over the Erskine Bridge up to Aberfoyle, Callander, along Loch Lubnaig, Loch Earn, on to Comrie, Perth, Newburgh, Newport at which point you could cross over to Dundee.

From Ayrshire to Renfrewshire, I would generally stick on national route 7, it's generally pretty direct and quiet.

Done this a few times

http://connect.garmin.com/activity/77864264

I will start with some advice, steer clear of Kilmarnock AND Dundee

I would personally take this route http://goo.gl/maps/tbrKd

But there are shorter ones http://goo.gl/maps/jvuI2