Re: What metal nuts/washers for head and manifolds?

Posted by Packard Don On 2024/6/4 12:30:01

I really doubt you would gain anything by using 8 grade unless the studs are also 8 grade. Also, as I recall, the nuts had a larger hex size than those with that thread size usually have but I’m not at my shop so can’t give the sizes off-hand. Prewar manifold nuts, at least on junior models, were actually brass although they were much longer than usual.

As for acorn nuts, I don’t think they’re attractive at all but that’s just my own taste.