Created a mock up tool. I used the old exhaust heat exchanger accordion type tube ( from the exhaust manifold up to the air intake housing ) because it maintains the right curvature as required. Then I can modify the exhaust into an exact duplicate.
The angles are very complicated, despite what you are seeing in pics
Remember, I'll need to create two of these. Top over bottom and seam them into one
A radical bend initially before making a sideways S curve and then twisting up past the torsion bar before joining both of them together into one. I will be making a new plate and weld it all together, like the original for proper fitment. Still searching for the downpipes exhaust gasket.
Last leg of the down pipe runners before they are attached to existing exhaust
Len's last post to this forum was 1 day prior to a surgery on Oct. 8, 2018. I'm sorry to report that he did not recover and he passed away on Oct. 14th. I retired 1 week ago - and finally have time to follow up on more loose ends. My retirement plan was to encourage and join Len in actually attending Datsun events. Sadly that was not to be. For now I am keeping the 510. However, I know nothing about mechanics so am relying on a friend to put it in a bit better running condition. The SX was sold, but still have a nonrunning 1977 F10 that needs to be sold. There are various Datsun pieces and parts, transmissions, engines, etc here - that are available for fair offers. Trouble is - I have to rely on a friend (currently busy farming) to identify. I can take photos - or if Datsun Mike plans to travel through E. WA, let me know and perhaps you can assist. Sorry - I don't know the protocols (selling?) for this Forum or the best/safest way to proceed. Thanks, Karen