Summit has a complete 350 rebuild kit for around $230 bucks. If your cylinders aren't toast hone them, polish the crank. Oil pump, steel sleeve shaft, cam and lifters -you're at like $400 bucks. For the heads - remove and clean all valves - lap them in and you've got a budget poor mans rebuild. If you need machine shop service then you need machine shop service and of course the price goes up.