[MoscowMule]

Hello we did a compression test on our 65 305 E today.A few cylinders were 100,103. Several were 95 ,but one was 75. Take it I'm not sure how much it has been run before we purchased it. Hoping the valves may just be gummed up.It starts right up idles and runs good.No engine noises. We plan on pulling motor in the next few weeks and tearing it apart.I have a complete gasket set.My question is how available is internal parts for these motors? Where could I purchase valve seals,rings,and bearing if needed?
I really want to keep this motor. Hoping it's nothing major,but my pockets aren't that deep to have a unlimited budget either.
Thanks Moscow Mule