how do you fix a exhaust a leak on the manifold,, i just rebuilt the motor and when putting the intake and manifold togther i did a small gap i i sanded the intake a little and used 2 gaskets on the exhaust side ,, do you think onces it gets hot i could retighen the bolts would help ???

thanks

1958 chevy biscayne
235 6 cyl 1 barrel
2 speed PG tranny