Looking for Info / Specs on Obsolete Mopar Piston

71 ABDC.

I would expect idle quality to be decent with the 114 LSA; if the exhaust duration was kept to 274 also it would not have too much overlap to make the idle rough. I am thinking you could get around 14" of idle vacuum properly tuned. With the cam you have now, it must be a rough idle.

Just making a guess relative to the cam you have now (228 @ .050"), the RPM band would move down a bit. This is not a basically torquey kind of cam, but you still have a lot of compression left to keep the low RPM torque good. If you could get near to a 60 degree difference in advertised versus .050" durations, then your advertised would be in the mid-210 range and that is not a wild cam at all.

The keys are the slow ramps and the wide LSA and no ground in advance in the cam. The old Crane cam I had like this had and advertised duration that was 60 degrees longer than the .050" duration.... not a lot of companies have such slow ramps anymore. Which is one reason why I suggested Racer Brown; he might have such things; their EH18 is in the neighborhood, tho' the ramps are a bit faster than I would want for a street cruiser.

The other company to ask is Crane. I see they still have some slow ramp cams in their standard catalog, and made those old long duration cams as their 'HE' series back in the day. Something like an H 272-2 is getting pretty close if the ground in advance is taken out in the cam setup; it would have a 67 degrees ABDC intake closure. (With a 114 LSA and 2 more degrees advertised duration it arrives at that 71 degrees ABDC number, so you can see that it is not far off.)