The engine depends on what year of truck you are talking about but as far as the 60's and 70's go. The Dodge D100 came with a 170 cubic inch slant 6, the more popular 225 cubic inch slant 6, and from there it jumped to a v8 the 318, 360 or 361 depending on the year and from there it went to a big block 383 optional.
points .020 spark plugs .035. and Dodge did not have a v6 then only a slant 6
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Can range from 272,323,355,410
torque flight 727
Usually ball and socket
The point gap in a 1972 d100 varies. For the 225 slant 6 cylinder the point gap is.017- .023. For the 318cid, 360cid, 400cid and 413cid engines the gap is .014- .019.
Dextron 2
Look at the rear lower end of the engine
my 1976 dodge d100 has a 30 gallon tank.
Spline end
It depends on which engine you have, Slant 6's and 318 & 360 can have A904 or A727 for the automatics and all the big block 440''s use the 727