Well my CBR build is finally underway
After a bit of reading what JT and Claude have said, what I thought was a 1980 Cook Bros, seems to be a '78 or early '79
I picked up this frame awhile back which came with the CBR BB. It's in mint condition, looks like the rear wheel was never moved, no seat clamp marks, no rust anywhere. The week the frame arrived an early matching set of forks came up on eBay and the seller was only 100k up the h/way. Anywayz ... don't think anyone bid on them bar me and picked them up for a great price.
Today the NOS Slant stem turns up ... so here's some pics