do all 318 dodge engines have same piston arrangments
When you say "piston location/arragment," are you referring to the firing order? 318's had the same firing order throughout it's run AFAIK, excluding the marine reverse rotation version.
is number one cilider front driverside?
Yes, all the images I'm seeing on the web for the 318 seems to jibe with the shop manual i have. So #1 is the front left (aka driver's side). Left side firing order from the front is 1, 3, 5, 7, and right side from the front is 2, 4, 6, 8.
Use this image:
Looking for a Used Dodge in your area?
CarGurus has 167,208 nationwide Dodge listings starting at $888.
Search Dodge Questions