save up till you can do all the engine work (crank,weld,port, cool head and domes), run the pipes till you can get others, they will prolly run okay.
get some stock carbs or 28pwk's. replace reeds if they are some what old.
dont need tz bearings, maxload's will be fine.
keep riding your bike as is, in the good weather.
hit up a sponsor, if they are close to you, they might match port your cases for the new ported jugs for a package price.