I agree Workhorse was originally GM so they use the Vortec V8 coupled to an Allison Transmission... When Chevy stopped making the 8.1L Vortec. WOrkhorse basically folded because they had no alternative engine.
Now. Ford Triton of Chevy V8
Ford's are higher RPM engines.. IS THIS a problem I do not now. on paper the HP and Torque specs are so close as to say "SAME". But the CHEVY hits peak torque at lower RPM.. I rather like that (I drive one).
But Id' say the Ford/CHevy engine question is basically a coin toss. Take you pick..
THis brings us to the Transmission.. NOW.. ALLISON.. Top rated. Many feel the ALLISON transmission is King of Transmissions. the best. none better and guess who is on the list of folks who feel that way.... FORD MOTOR COMPANY.
THey billed there latest Tranny offering as "The answer to the allison".
NO. it's not
YOu would be amazed at the testing Allison does (Used to attend church with a former Allison Engineer)..
