I have 2 slant six engines out of a 1967 Clark Cortez motorhome. I am trying to identify exactly what they are. I have Chrysler serial numbers for one but the other I just have a block stamping. The block number is
8 225T 5312 ELC. Any help would be greatly appreciated.

Welcome to the board here. H'mmm...there's a lot of variability in engine stampings, but those numbers don't make a lot of sense. The "8" should mean a 1978-model engine, and 5312 looks like a date code based on Chrysler's 10,000-day calendar, but 5312 decodes to 12 February 1976, a date too early by at least a year and a half to go along with that initial 8 (could it be a 6? They sometimes look very similar on the stamps). Or could the date code be 5812 (26 June 1977)? Always keep in mind the possibility of an erroneous stamping, too.

T: Truck engine or Trenton engine plant
E: Cast crankshaft
LC: Low compression. Er-ruh...that's weird, too. Low-compression engines, equipped with different pistons than standard-compression engines, were primarily for export vehicles sent to countries with low-octane gasoline. I guess it's possible they were also available for industrial applications where ability to run on low-test gasoline was more important than maximum torque and power.

If you are planning on taking these engines apart, it will be interesting to see what pistons are in there.

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