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to refer back to the main post, The 198 coded B as standard, The C was simply for 225 option, and special order six code was an E. which is the code on a slant six taxicab or Police.They also had a 727 transmission. Try to find one of them laying around.

I used to drive a tug, 225 slant six and 727 auto. top speed 15 MPH! Rocket ship from 0-15. Pulling airplanes! in 1973

Thanks slantsixdan, I only know because I used to own one. The 198 was available thru 74', and was about the slowest slug on the planet at 101 Horsepower.The other place special order 225 was available that year was police cars and Taxis.

225 engine VS 198 standard

X2 with all above. Really the numbers were being manipulated to pacify Insurance companies more than anything.There were Many fatalities with the muscle cars, and theft was rampant. Insurance companies needed to be convinced that Horsepower was being reduced, which in turn supposedly reduced...

X2. Throttle kickdown is in no way connected to the shift cable. Time to fabricate a replacement mechanical setup.

When I do a tuneup on the slant six, I pull the distributer, and set the points while on the bench. I do that because there are six lobes, and when they wear they don't always wear the same, so the gap changes from lobe to lobe, as well. That will effect the dwell, and tells me how much life...

You hit it on the head, mopars are tough, and unleaded fuel in it self didn't cause any problems. But when you add the additional issue of tightening up emissions, all the manufacturers had trouble. Mopar just had less. except 440's and the slant six. They ran hot, and cracked heads because of...

In the early 70's The Industry had to deal with two issues, lead and emissions. 60's Mopars could deal with lead free. However, adding the restrictions on emissions at the same time, with the smog controls that followed, Increased cylinder head temperatures, and lean fuel mixtures; This caused...

Thanks again, I got it. as time went by and my older cars showed no signs of damage using the unleaded fuel under normal use, it was clear that at least Chrysler products were overbuilt to the point of tolerating lead free fuel more than the competition. As a mechanic then, I noticed other...

Thank you, but the link failed , could you send it again, or PM me a link?

3751213's are motorhome heads, designed for unleaded engines, motor homes mostly. If they did that, it wasn't the fuel. I am curious though, and may look them up to see why they would do that. Alcohol additive, super lean maybe?

Leaded fuel was available until the early 80's. Lead free engines with catalytic converters began in 1975. Coincidently that was when the octane dropped, because lead was an additive to deal with the octane issue of pre-detonation for over 60 years. In 1983 regular was 94+,premium was 98. After...

Many people seem worried about hardened seats. But Just for Information, my machinist with over 30 years experience, building engines told me that the originally Installed 1960's mopar seats are harder than any ford or chevy seats at the time. And, any new seats he would order for my engine...

there is a 122 teeth gear on ebay for 55.00 plus shipping. The ring gear is pressed on.don't buy any 122 unless it says slant six. the v8 is 122, but the bolt pattern and crank diameter is different.