First question / Early A

66dartgt said
Ah ! the wrist pins do weigh a ton!!! Maybe you can use a 318 pin and get pretty close to the oem balance weights. Do you have any old 318 pins sitting around ?

I have to take a look!

66dartgt said
I have some data for you from the oem service manuals. I have a 77 (close enough to a 78) and 66 service manual - here are the weights for rods and pistons.

77 318
rod weight 726 grams or 758 grams
piston weight 594.6 grams

66 273
rod weight 726 grams
piston weight 530 grams (2bbl)
piston weight 569 grams (4bbl)

I think these specs above do not include the wrist pins, rings or bearings.

good luck !

If I add the weights I am comming to the following result.

Old 318 combination (without pin)= 1352,6g

New combination (273piston, 360 heavy rod, no rings/no pin) = 1286g

So I will have a difference of 66.6g, if I would use the same wrist pin.

:-?