Personally, to me, it appears that you have built an engine beyond your needs.
If you're just riding around the back yard, or maybe dirt trails and roads, you don't really need 1000hp with a brazillion pounds of torque.
I replaced the engine on my warrior with a 212 Rota-derp, opened it wide up, and it runs great on a standard TC.
It might just be me, but I find 30+ mph just fine for putting around. It'll probably do 40+ on the flats.
I find anything above that starts feeling a bit scary. A little bit more torque would be ok, but honestly, I'm quite pleased with it stock, and a straight pipe. I have a 10 tooth on the driven, and I changed the rear sprocket to a 60 tooth.
I just don't see the purpose of putting a 454 in a VW bug.