First question / Early A

66dartgt said
If you are using a 78 318 crank with the 273 pistons and rods I believe you will be out of balance. The later 318 rods are heavier than the 273 rods, pistons are probably the same weight. Crank will need to be rebalanced to the 273 parts.

I am having 16 heavy 318 rods and I hope eight of them are in good condition. Next week I will check them.

I will use my 273 stock pistons and assembly the 318 heavy rods with the press fit. So I will take the pistons without piston pin lock ring. (I hope my English is ok?!)
Do I have to upgrade my old pistons with a oil drill for better lubrication?