41 Plymouth Hot Rod Build

I put a one piece gasjet on it and its leaking between the snout of the timing cover and the seal. I think I'm going to have to loosen the water pump and timing cover and try to pull it down. Will I get water leaks if I dont remove and reseal those bolts?
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If you're leaking oil from around the harmonic balancer seal then yes you need to loosen that cover up and Center it to the harmonic balancer. But you don't want to loosen the cover up and just shove it down because then you're going to have problems with your harmonic balancer seal.