I would try to establish what is causing your specific problem then fix that.
Bores can readily be inspected / measured (at least you'll get a good idea) with the head removed (which is easy); as can valve guides.
If worn / poor condition you know what to do; if good your attention might turn to pistons and rings which on many cars can be removed without taking the block off. Rings are sometimes fitted upside down which might well cause oiling issues.
Are you sure you have the right plugs? Have you tried a compression test?
Not saying 'don't do it' but be sure of the reason to do so or you may find yourself back to square one again.
Bores can readily be inspected / measured (at least you'll get a good idea) with the head removed (which is easy); as can valve guides.
If worn / poor condition you know what to do; if good your attention might turn to pistons and rings which on many cars can be removed without taking the block off. Rings are sometimes fitted upside down which might well cause oiling issues.
Are you sure you have the right plugs? Have you tried a compression test?
Not saying 'don't do it' but be sure of the reason to do so or you may find yourself back to square one again.