[b-man]

Originally Posted by dbiggs

If I can slip in a question to you knowledgeable fellas...swapped my 300 for a 350 but can't find a dipstick/tube to fit...any idea what will fit? Will a tube from any after 67 fit? Thanks

Since you’re not going to find anything earlier than a ‘68 TH350 dipstick tube from an A-body Pontiac I’d be looking to try one of those. For my own ‘64 Le Mans with TH350 swap I procured a dipstick and tube from a ‘70 Tempest to try, haven’t done the installation yet but pretty confident it will work.

After having done a couple of TH400 swaps into ‘64 A-body Pontiacs using ‘69 GP dipstick tubes successfully I am again pretty sure anything with a similar/identical firewall profile should be a good dipstick tube donor. The ‘69 -‘72 GP (G-body) and possibly a few years later were essentially an A-body on a lengthened frame, so you can safely assume the firewalls were nearly identical. Even found out not long ago that a ‘70 GP TH400 dipstick tube was a perfect fit in a ‘68 Firebird.

Good luck.

[66sprint6]

Yesterday we switched to a different dipstick tube for our newly installed TH350. It was a huge pain. But the old one was leaking badly where it slipped into the tranny. We ordered this TCI "Trick stick"because of it's reputation for not leaking. And it does not leak now it's a huge relief. But the installation was difficult due to just the slightest difference in bends from the original. We massaged the heck out of it and then I see that the tab used to grab a bellhousing bolt is nowhere near anything bolt-able.
So I'm going to try again but at least the leak has stopped. The next one will definitely have the seal that looks like a hat at the tranny end of the tube not the O-ring.