I was searching for any info on 198CID E-Bodies and found this info. It discusses the A93 package which is the Coupe with available 198 CID engine.
"All 198 Bodies are coupes. The Challengers were called Deputy's (only in 1970, I think, they were also just known as Coupes in 1971) and the Barracuda's were Coupes in 1970 and 1971.
All such cars were designated A93 on the fender tag and broadcast sheet. The 198 was the base motor offered. Optional motors were 225, 318, 383+2 and 383+4. If the car did not have the A93 code then it was a "regular" Barracuda or Challenger.
NO 198 convertibles were made as all A93 cars were coupes. The A93-equipped cars were introduced at the end of FEB 1970, so they were basically a mid-year option that carried into all of the 1971 model year."
Wikipedia had this to say, "Beginning mid-year 1970, and ending with the 1971 model, there also was the Barracuda Coupe (A93), a low-end model with the 198 cu in (3.2 L) Slant Six as a base engine, lower-grade interior, and (like other Coupe series Chrysler offered that year) had fixed quarter glass instead of roll-down rear passenger windows."
And this info on production of 1970 Barracuda Coupe (A93) said, "1970 Barracuda with the A93 package, 945 U.S.-spec cars had either of the Slant Sixes."
That makes a 1970 Barracuda Coupe with a 198 CID engine a very, rare car. This one is a 999 paint code in "Petty" blue. Very, very rare.
I also found this immaculately restored 225 Slant Six Barracuda:
https://www.hemmings.com/stories/2021/10/29/is-it-nuts-to-restore-a-slant-six-barracuda