Intake/Exhaust Gasket Help
Remflex. Always only ever
Remflex. It is very much worth your while to get them and use them. Hardware and installation technique, see
here and
here.
The pre-'73 chokes do not work correctly when installed on the '73-up manifolds. Get one of the
Electric choke kits, it'll make your life a lot easier.
160° thermostat is too cold; you're wasting gasoline and crapping up the engine oil with it. Put back the correct 180° unit—read
this.