I've ran 75/76 degrees on a Giant TCR-1 and felt that it worked very well, in fact better on some hilly courses than at 78 degrees on a tri bike.

Basically I would set the bike fit up properly as a road bike first. In this position I found my most comfort with the handlebars raised 1 1/2 cm or so. When shifting the seat forward to the approx 75 degree seat angle all I did was drop the handlebars to the lowest allowable position, thus effectively having the same effect as lengthening the top tube. To estimate your approx seat angle, Dan has drawn a nifty chart on his bike fit section. It shows how you, when knowing your proper seat height, drop a plumbline from the front of the saddle and by measuring the distance from the bottom braket can estimate your seat angle. All you have to do is adjust the seat fore/aft accordingly..

I ran Syntace C2 Ultralite aero bars. When in the road position I just griped them short just behind the grips. This way they acted as shorty aero bars, such as the "big slam" or Profile Jammer GT's that I had on my other road bike. This way I wasn't extended in a road position. When I shifted the seat forward for 75/76 degrees I could then grab the aero bars on the grips as my body was now a bit more forward.

The way to set this up now IMO, is with an M2 Racer power module seat racer. A very easy adjustment and you can shift the seat foreward/aft in a few seconds without dickering with a Allen wrench. A great investment for only forty bucks.

This all woked fine for me. At 75/76 the TCR-1 felt quite balanced, much like as in the road position. This was entirely different with this bike when at 78 degrees using Profile froward seat post. That way really felt squirely.

Dan's nifty chart can be found http://www.slowtwitch.com/...techctr/bikefit.html