[Lynn Eades]

Bolt length o/all 4.125 (4 1/8") Head 11mm(7/16") Head is 1.000" accross the flats. Tube dia.= 19mm(3/4") The hole has been drilled 76mm, but only threaded to 40mm
O/all thickness of square washer=8.6mm. 32mm high and 34mm wide.
Round washer 4mm thick. The manifold stud looks like 9/16" UNF. Use a good bit of steel. A lot hangs off it.
On another subject, I see in your 3rd picture of post #5. on the extreme right of the picture, you have some leather rear hull/actuator rod seals. I have one only, and have never seen them anywhere else. Are they easy to get in Canada? I also have a rubber version. See pictures. Is the leather bellows on the bisector pull rod still available N.O.S.?