I'm riding a 1995 Trek Multitrack and I really like it except that with the stock fork it has a ridiculous amount of trail (74+ mm). I previously owned a bike with a trail rating in the mid-60mm range and preferred the handling much more. I recently bought a Dimension fork with 10mm more rake than my stock fork and installed it and I'm much happier with the handling (trail 63mm). The only issue is that the fork is very thin and I'm not real comfortable with it's strength, given that I weigh over 350 lbs. Plus, it looks funny.
I've been looking for more suitable forks and aside from going custom, there isn't that much out there. Plus, for the price of a custom fork I'd probably be better off just buying a new frameset. I'm researching the option of simply re-raking the original fork but I don't know if it's possible. The diameter of the fork just below the canti boss is around 31mm (vs 25mm for the Dimension fork), so it's pretty beefy. I've read that heavy tubing isn't a good candidate for re-raking but I don't know what constitutes "heavy". I would like to add 10mm of rake to get it to 50mm, which is equal to my Dimension fork.
Is this even feasible with a thick fork like this? Is it cost-effective vs buying a new frame? The fork is 1" threaded and cro-moly.