This was me a year or two ago. I weighed 243lbs, I had chronic heartburn, chronic insomnia, and to run 1/4 mile without stopping to catch my breath was impossible.
Initially, I stopped eating dead animal carcass just because I realized if I wouldn't personally be willing to cut a cow or pigs throat myself, how can I justify paying someone else to torture and murder that animal for me?
Removing carcass from my diet was amazing. Heartburn was gone in a week, insomnia became manageable, and I started running on my own purely for the pleasure of running (running had always previous felt like torture than pleasure). As a vegetarian my weight dropped from 243lbs to ~185lbs, and just stayed there. I wasn't dieting anymore, it just stayed ~185lbs.
Then I eliminated animal bodily fluids from my diet (milk/butter/cheese etc).
This made a massive positive change in my life, and body weight dropped to 160lbs without dieting! No more insomnia, never again have experienced heartburn, and I can now run 20miles continuously without so much as a drink of water along the way, and not feel tired. At 160lbs, I can jump and climb and run and ride and play hard all day and never get tired or fatigued anymore, I never would have believed this human body machine is such a capable device when you simply fuel it properly.
I used to eat almost only meat (fruit or veggie of some kind less than once per week). I never had inner peace, I never knew how amazing it feels to be piloting a healthy human body. Now I eat only veggies, fruits, nuts and seeds. I've never appreciated and enjoyed my meals more. I've never felt this healthy, even as an athlete (swimming) in highschool/college. Most importantly, ceasing to pay others to constantly be torturing and murdering animals helped me to find an unbreakable inner peace. Reguardless of whatever the situation may be, there can be no moment in life without inner peace that is better than any moment with it. My joy and elation is perpetual, unlimited and unbreakable, and yours can be too!
Nobody in the world can do it for you. It is something only you can do for yourself by choosing to do it. I know if you want to make that 700lbs number into perhaps 165-170lbs, it only takes choosing to skip the animal carcass and bodily fluids when choosing something to eat. Raw leafy green vegetables WORK.
With respect to the bicycle build, which I think is awesome, listen to Chalo. He has spent a lifetime acquiring expertise of all things related to heavy duty service bicycles, and has never steered me wrong with advice.
it's a good addiction to have. 
