i have recentley rebuilt a amc 304.now that i have finished it, ive been doing a little reading on the motor,and i keep hearing about rear main and dist. gear oiling problems.now this is a bone stock motor.do i need to worrie about that ? or is this for just a high rev motor.this is my first rebuild i have ever attempted,so i would like to get it right.or now since it already put together is it to late to add a valley oiling system ? any info will greatly be appricated.