i have heard that the Poly motors shared the same block architecture with the early Hemi's and that the Hemi heads would bolt onto the poly block. is this true???
-Tim
Some of the first gen Hemis and Poly's had shared components. The 325, as well as a few others came as both a Hemi headed engine and a Poly headed version in the Dodges. The biggest difference between the two was the valve train, with the Hemi head being a two rocker shaft engine and the Poly have just the one. I believe the same year the base D500 engine was the 325 Hemi headed engine. Correct me if I'm wrong on this, but Plymouth had only the Poly V8s available, Dodge and DeSoto had both the Hemi and Poly V8s, Chrysler having only the Hemi headed versions in the 354 and 392 engines. Or was DeSoto only Hemi's, too? I don't believe I've ever read about or seen a 330 Poly. With the Hemi's being phased out for the B engines, the Poly's or "A" engines were used as a "small block." Which is really a terminology carried over from the Chevy crowd, as the "A," "LA," "Magnum," etc, being correct. Even now, the "A" engines carry a terminology from the early Ford OHV V8 crowds with a lot of people referring to them as "Y" blocks.