Manifold Hitting the Block

Glad that I just read this. I just overhauled my '72 318, not in yet, and just have 2 nuts on finger tight holding the left exh manifold on. Looked at this area and yes it is tight, but OK. What I did notice is the manifold is ever so slightly warped, and definitely will need to have a gasket. Going to post the passenger side manifold problem, heat riser.