Join Date: Apr 2001
Location: Rockford MI
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Re: Iron Duke 4 cylinder?
The original 153 c.i. Chevrolet Iron Duke was designed for and used as OE in the Nova during early 60s. This is the Iron Duke that has kinda like a cult following and is more rare.
The 151c.i. Iron Duke that was used in Jeeps was designed and built by PMD (early 70s). Intended to be 'economy' engine... i.e. durable, fuel efficient, easy to maintain, withstand neglect, etc. It is an Iron Duke only by name, it shares no parts with the original Iron Duke built by Chevrolet.
Added Value - the PMD Iron Duke engines were also used in many RWD GM cars and trucks from mid 70s to mid 80s so parts are available and donors are plenty and TBI is (almost) a bolt on upgrade and the BH pattern is exact same as SBC. Note: FWD version of the Iron Duke has changed BH pattern but I think internal parts will swap and that it is possible to use heads from these engines to add port injection to your Jeep Iron Duke. Performance upgrades and hop-ups are available, like the Pontiac Super Duty. However, most of these favor high RPM HP (speed).
There was some discussion, re the Jeep Iron Duke, on this BBS several months ago. You could also search the net for "Iron Duke" or "Pontiac Iron Duke" or "Nova" or "Pontiac Super Duty". Seems like to me that tons-o-information could be found that way... if you are interested.
Probably aren't worth much... doesn't seem to be much demand for durable, low HP engines. I got one from a 48k mile '80 CJ-5 with a SR-4 and a D300 attached - $50.