Wanted plug for 396 427 four bolt main motor

[3macs1]

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Looking for correct plug for 396 427 four bolt main motor in the pictures I have provided they were on the 65 66 67 68 69 70 motors which the big block four bolt mains were different size then the others.

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Hi Barry:
I asked this question in Bill's post for one for a 69 but no one commented. I had a box of 10 of those NOS GM that I bought when I raced the 66 l-72's.Mine have "W" cast into them as did the ones on my 66 engines.If that works for you send me a PM with your address and I will send one down to you. $10.00 will cover it of which $7.50 is shipping to the US which is hard to take.
Here are pictures of my nos ones