aljohnsonii

i have a 350 bored .030 over with a high rise cam i dont have the cam specs yet but will try and get them my question is will a over tightened rocker cause excessive blow by i have a loap to the motor and it runs fine down the road at idle i have a small amount of white smoke coming out of the tail pipe the motor has been completely rebuilt for ground up and i dont know where the smoke is coming from it i can pull a pvc valve off and put my finder over the hole and it comes out of the dipstick just wondering if that is from the motor breaking in or if it might be a problem somewhere im overlooking also anyone know what would be a ideal timing for this setup any help would be great thanks