This was the directions I got for a .150 flex shaft.
The main stuffing tube will be a 1/4" ID tube. Glue a piece of 9/32" into the tub that goes through the engine/radio bulkhead and through the bottom of the tub inside the radio box. The exact position you will have to work out on your own, as we are not there to show you. With the strut in place, about where you think it should be, and a pin in your engine's collet (stepped up with brass tubing to locate the main stuffing tube), suspend the stuffing tube (with "over" tube in place) between the strut and engine. Bend the stuffing tube around in such a way that it can float fairly freely, with no tension on the tub bottom or bulkhead. Glue the over tube in place with epoxy. When it's set up, remove the stuffing tube and start reinforcing the over tube with fibreglass, at both the bulkhead and tub bottom.
A slight curve in the over tube (close to level at the bulkhead and more angled at the tub bottom) will hold the stuffing tube in place after final installation, yet you will still be able to push it through the over tube.
Use a piece of 3/16" ID tubing for a strut bushing, with a very short piece of 1/4" tubing at one end to prevent it from sliding inside the stuffing tube. A few holes or slots will provide for good lubrication.
That's the basics. There's more if you need help.
Thanks. Brad.
Titan Racing Components
BlackJack Hydros
Paul
If this is any help thats awsome but if they dont I am sorry
