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For 1970, Legendary back seat covers have the Plymouth emblem embossed in (like original), the Year One do not. Year One 3 month wait. Legendary 9 month wait
Get ready for a FLOOD of opinions! My 2-cents is I would look for a similar cam, but “split profile” with a little more lift/duration in the exhaust side. If you have 3.23 or smaller numerical gears, you’re looking in the right range
You’re on the right track. Get new brackets or continue modifying what you have. Washers, longer/shorter bolts, bolt “sleeves” (spacers), etc. Line it up straight and get a shorter belt if needed. You’ll get there
I took some rough measurements on another OEM crankshaft. The hole is about 1-3/4” deep with about the last 1/4” not threaded. Also, the first about 3/16” of the hole is beveled and not threaded. Looking down into the hole to the last unthreaded 1/4”, do I need to drill that to 11/16” first...
Your 3 points are correct, but I'm thinking "advance spring strech" would affect your mid-range ignition advance, not high rpm advance since the slots inside the distributor limit the maximum advance. The springs set the rate/rpm where you get to that maximum advance
That's roughly correct. I can't remember which direction you turn, but it adjusts "how high your vacuum needs to be to get vacuum advance" or in other words "what vacuum level cuts out the vacuum advance when you push down on the gas pedal while cruising". Like, if your vacuum at cruising is...
You may be correct, but i warn you not to assume all your tests under the hood are correct. It's extremely hard to know that since you have no power, so don't rule out issues under the hood just yet. It's pretty common to get a "borderline connection" at the firewall disconnect plugs under the...
One other thing…IF it only pings when you are already at highway speed and floor it, “maybe” your vacuum advance needs adjusting (Allen wrench inside hose connection nipple in distributor)
That was my thought. It “looks” like someone got in a hurry and put the impact to it while it was cross threaded.
Any idea how deep that hole is vs the bolt? Which metal is harder, the crank or the bolt?
I ordered a small block bolt (1” longer, same thread) and a tap/die. I want to at least...