[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.