Fabricated the plenum tiedown cables. Attached 1/16 ss cable to firewall side of plenum tiedown hard point installed earlier. Put nylaflow tub around cable. Attached an eyelet to other end. Cable wraps under engine just below push tubes and attaches to prop side hard point with safety wire. see photos.
Layed up 5 bid under oil filler hole on cooling plenum. Was able to mark location of oil filler tube fairly accurately