Google it. It is reported (as I said) that he lobbied against the pro-life plank. I think it would be an excellent question to ask him during a debate just to be sure. I've seen it reported in several places on the Internet. Chuck Baldwin is one of the sources. I'm looking for more verification, but the reports are out there along with reports that he ran as a pro-choice candidate both times he ran for Senate. That, and his core sponsorship of CFR legislation, would explain why, as far as I know, no pro-life groups have endorsed him.
Here's Brody's article on Fred wanting to ditch the platform in 96 as a way to quell party infighting:
http://www.freerepublic.com/focus/f-news/1864165/posts
It seems misguided to me, but his basic point was that all of the energy was being directed inward instead of at trying to win the election.
Spiff is clever to point this out, especially when he supports Mitt Romney, a candidate that is on video trying to out-choice a pro-choice activist candidate for governor.