I been reading about six cylinder hemi`s and Chrysler was developing a D engine in 1966 but abandoned it. All I found was the Australian 245 D engine 4.0L released in 1970. I`m curious if they ever made them here in amarica? Seems like since the popularity increased on early hemi`s so much that it`s getting hard to even find a 331 engine, and when I do find them people want a thousand bux for just a stock one. I given up on finding a 331 or smaller hemi. Seems like dodge`s old six cylinders can be pretty tough, Like the dodge dart slant six. I seen a few with blowers on them. I`m wondering if there are some cheaper alternatives for hemi`s. Poly engines seem pretty tough. I just lost my 57 coronet that was stored at a storage lot that the IRS siezed including my 57 dodge. It had a 325 poly engine.