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Ok, got it. Cam is a Comp Cam Hydraulic Roller with;
Lift .541 intake .537 exhaust
Duration .230 intake .236 exhaust
Compression is 10.1
Proprietary??? That's a XR280HR
They may have cut it on a LSA tigher than the shelf 110* to make it "custom".
That thing shouldn't idle real choppy.
Look at the initial timing FIRST! Use a vacuum gauge or just turn the housing CCW and see if it picks up RPM. You'll likely need to work on the mechanical advance to clean it up. My guess, 18-22 initial timing and 14-18 in the mechanical advance.
It should idle easily at 800-850rpm, with very little chop to it. Shouldn't smell like a fuel truck out the tailpipes either.
Ok, thanks! I think the proprietary part he spoke of was the combination of parts to make the build, but I don't know. I appreciate the info though and you can bet I (actually mechanic) will be tinkering with the timing/distributor. What ignition system would you recommend if I decide to spend just a little more and replace the MP orange box/distributor/ballast resistor system i have now? MSD?
Facts are stubborn things.
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