67 400hp Oil Drain Plug Question

[David S.]

What is the most common oil drain plug for a 67 400? Does it have the "TR" or "A" head mark? Also what is the size of the head? 7/8?

Thanks,
Dave

[John H.]

Re: 67 400hp Oil Drain Plug Question

What is the most common oil drain plug for a 67 400? Does it have the "TR" or "A" head mark? Also what is the size of the head? 7/8?

Thanks,
Dave

Dave -

The head is thin, the hex is 7/8", and "A", "TR", and "L" headmarks are commonly seen.

[David S.]

Re: 67 400hp Oil Drain Plug Question

Thanks John!