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#36296 01/12/2004 4:12 PM | Joined: Aug 2000 Posts: 346 Shop Shark | | Shop Shark Joined: Aug 2000 Posts: 346 | Yachtcare,
The T indicates a tapered seat on the plug.
These were used in later V-8's (somewhere in the early '70's Chevy changed from the flat seat with the copper gasket to the tapered seat w/o gasket)
Sounds like the old plugs may have been incorrect for the 235. The R45's are the right ones.
'38 Chevy 1-1/2 ton
'49 Chevy 1/2 ton
'54 Chevy 6400 2 ton
'55.2 GMC 3/4 ton
'56 GMC 1-ton
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