Just Ordered most of the rebuild parts for my 200 I6 turbo engine. got them from www.classicinlines.com . .030 over speed pro flat tops, plasma moly rings, clevite 77 bearings, corteco gasket kit, JP performance dual roller timing chain, and Yella Terra Full Roller rockers. $1,133.17 shipped. I also recently bought and recived a used '78 Ford 250 I6, D7 casting head, nice head, smooth ports, big intake log, and the carb base mount is lower than on my '67 head, so I'll have more hood clearence, but also, $60 bucks or so has to go into new valves for that. I also gotta get the cam from Isky, and the springs/ retainers to match the cam, prolly going to cost about $300 for that stuff. then, no matter if I go EFI or Carb, it's going to cost right around 1k, for that stuff. This game is getting expensive, But I can arleady taste the exhaust fumes.