[BruceWilkie]

I like this build!

Try to build a bracket that fully supports the turbo at the exhaust flange to take the weight load off the header pipes. My old turbo corvair the factory had a .125" thick bracket that bolted between the turbine inlet and the head pipe and the bracket attached to the motor. Even after upgrading the turbo the original 1962 head pipes never had any issues.(I had that car till 77) I'm sure the cast log manifolds helped pull some heat out, but with aluminum block and air cooled there had to be considerable expansion/contraction going on. I think I can find a picture of the turbo mount if your interested.

btw currently putting a turbo on the 305 in my 84 GP till I can build a worthy Pontiac motor. Doing it as inexpensive as possible. Even making my own flanges(3/8 plate and remains of an old set of 1.625 pontiac headers). I'm using whatever I can scrounge cheap or free. (plasma cutter tips are pricey for what they are I've burnt up two so far). I decided a rochester 2jet from my old 68 Catalina will be adequate for the 305. Surprisingly finding a large base sbc 2 barrel intake wasnt easy but I did get it near free. I might get this whole project done under $500 including the turbo I bought.

Best of luck with yours, its certainly a lot nicer.