Re: The Duchess Project: 1940 Super 8 Convertible Sedan

Posted by Joe Santana On 2018/1/18 10:22:45

The new rolled-thread studs #403255 7/16"-20 3-3/32 for this '48 356 engine have been ordered from Bruce Blevins. Because he focuses on pre-war Packards, he lists them in his catalog as #341119 because Packard made #341119 with rolled thread before 1940, but as Howard pointed out, they made #341119 with cut-thread after 1940 to early-'47 (and so #403255 may not work in '40 to early-'47 356 engines because Packard returned to rolled thread for 356 head studs giving them the #403255 number to distinguish them from those 1940 #341119 cut thread). Whew.

I also ordered stainless acorn nuts #141987 same as #228531 from Bruce.

The cylinder head washers for the '48 356 are G103342: ID 15/32 (.46875), OD 59/64 (.921875), 5/64 (.078125) thick.

Bruce was out, so I found #91950A048 316-stainless at McMaster-Carr. I ordered 3 packs to get 75 washers total because, even though we only need 38, they have a range of thickness .051"-.080", so we can cull out the thinner ones. Onward and upward.