Exhaust Manifold Gasket

[Mark E Blitman <Fedsales@xxxxxxxxxxx>]

hi gang:

my '74 imp. needs one replaced. other than a little extra noise what is 
the down side to not fixing? i am getting horror stories about the 
problems i may be facing if I go ahead with the repair..currently all I 
am experiencing is a little extra rumble which is less than my neighbors 
new truck..thanks!