Mopar purple .528 for a 383?

MidnightSwinger said

I was only going to try it for testing purposes to see how the two manifolds stack up. But the whole build just took a 180 as I found a screaming deal on a set of aluminum heads.

So I will be selling(this is not an ad Mike)the street demon, dp4b and 906’s and putting that money towards a carburetor. I’m not sure what carb I’m going with yet…. the ever evolving build.

Now the cam will be the limitation, but I have to stop the madness so I can actually drive this thing one day. I’m committed to the .528 at this point. My whole build is centered around all the cool **** that makes Mopar awesome. So the old school mopar cam fits the build, and should sound wicked with the Hedman long tubes and Dynomax ultra flos.

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Nice what kind of aluminum heads? Regardless of brand/type they should have smaller closed chambers than the 906s which will give you a nice bump in compression and much better knock resistance. The Edelbrocks on my 360 are the "open" chamber (more like recessed closed chamber) versions intended for positive-deck 340 pistons but I'm running them on a 5.9L Magnum short block with stock pistons .050" below deck. I've accidentally had the initial+mechanical advance as high as 44 degrees BTDC (on 85-octane regular gas at 5000' elevation) and not once did I ever hear pinging. No shiny specks on the plugs either. I currently run 87-octane regular pump gas near sea level with 36 degrees and it screams with no signs of detonation.

On the other hand the 360 in my D200 pickup has stock open-chamber iron heads and stock cam with around 8.2:1 compression and that will ping when it's hot out with the total advance at 32 degrees, go figure. I'm about to put a colder (180-degree) thermostat in it to help with that.