I am about to reinstall my intake and exhaust manifold on a 1956 235. when I removed them for paint and new gaskets, the sleeves were not installed before. So my question is do I need to buy and install the 3 sleeves or just put a new in/exh gasket on and go?

Also I had seperated the intake and exhaust from eachother and for reassembly do i need to bolt them together tightly or loosly before they are mounted to the engine?

Thanks in advance for the help!!

Building 1949, 1950, 1951 1/2 tons. Why three, cause one is never enough...