[66dream]

I have a zz383 and was told I need to run a melonized dizzy gear.
So I went to local GM dealer got a gear and it will not fit my Mallory Unilite distributor pn 4748201. ( the hole in the gear in drilled on center and the hole in the dist. shaft is not, its at an angle)
GM says "run a melonized gear "
I called Mallory, they said there shafts are drilled at an angle not to worry & I don't need the melonized gear "there gear is fine to run with stock roller cams" but when I asked the tech at Mallory to give me his last name he refused.
Has anyone else ran into this?

 

[GuysMonteSS]

Do you mean the hole for the retaining pin is on an angle ? I've never heard of this,maybe its a Mallory thing ??
Personally,I would run what GM says to use,maybe switch distributors or drill another hole in the shaft ??
Guy

 

[66dream]

Yes the hole is at an angle. tech guy at Mallory say that is because the drill walks when it hits the hardened shaft when they drill it. (well duh)
Trouble with runnning what GM says is that you get different answers as to who you talk to Scoogin Dickies or Pace Performance. Guy at one tells you that all new dizzys (now matter where you get them or brand) come wtih Melonized gears other place says no.

 

[Schurkey]

Yes the hole is at an angle. tech guy at Mallory say that is because the drill walks when it hits the hardened shaft when they drill it.

Good-sounding lie. I figure the tooling for drilling the hole is worn-out, substandard--or non-existant--and so they just pop the hole where ever the guy doing the job feels like it. It's a well-known problem. Quality of Mallory distributors is very questionable. I bet yours is similar--but not identical--to this one.

 

[Dave427]

I put a melonized gear on a MSD Pro Billet distributor. I had to ream the melonized gear to .500 since it is at .491. Other than that the roll pin hole was in the right spot. You need to run this GM melonized gear though for sure.

Dave

 

[Bob West]

No issues with Mallory distributors here, I'm using my second one and I've used two of their unilite conversions in my hotrodding days dating back to the late 70's and I'm using their ignition box too. I order my cams with a cast iron gear or in Harolds case an everwear gear.

 

[GuysMonteSS]

I put a melonized gear on a MSD Pro Billet distributor. I had to ream the melonized gear to .500 since it is at .491. Other than that the roll pin hole was in the right spot. You need to run this GM melonized gear though for sure.

Dave

X2