[PontiacsForLife]

I am about to put a new exhaust system on my '62 Tempest (4cyl), and would like to install at least a 2-1/4" pipe. I have some questions regarding the exhaust manifold:
1. Will a 2-1/4" or 2-1/2" pipe bolt up to the stock 4cyl manifold?
2. If no, should I replace the exhaust manifold with a 350 or 400 log manifold? Will a 350 or 400 log match the (essentially) 389 head?
3. Is the 350 or 400 log a less-restrictive manifold?

If I keep the stock manifold, I plan on removing the butterfly valve and plug the shaft holes then block off the heat crossover underneath the carburetor. Is there any problem with that plan? The car will never be driven in sub-50 degree weather.

Thanks,
-Adam