is this the right dizzy gear?

[billison]

View attachment 449412

the one on the left come out of my car stock, and the one are the right is on my new hei dizzy, the they look the same expect that little black nub on the end of the stock one as seen below, how do i tell if it's the same, i can't see a difference but i'd rather not risk it. thanks "its for a 85 cfi car, i'm doing a swap to carb"
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cfi to carb swap in progress

 

[68torinogt]

maybe itll work but i would make sure it turns the oil pump or itll go BOOM!

 

[billison]

how do i make sure it turns it?

 

[68torinogt]

i dont really know lemme look it up.

 

[68torinogt]

does it come with a oil pump shaft??

 

[billison]

nope, just what it has here, can i buy this part and put it on? and how?

 

[68torinogt]

still trying to pull some stuff up

 

[68torinogt]

whats the part number you may have the wrong one

 

[68torinogt]

i think it is a roller car dist. and you need a pre85 dis.
or visa versa

 

[billison]

i thought the gear it's self was saposed to be differnt, not the shaft, can't i change it?

 

[billison]

even then, could'nt i put a oil pump shaft on?

 

[billison]

can i pull the one off the old dizzy and put it on the new?

 

[68torinogt]

i dont know it didnt look like they were having too good of luck with it on another forum that i found on google.

 

[billison]

with what, what did you search?

 

[68torinogt]

dizzy hei oil shaft

 

[68torinogt]

the problems varied

 

[billison]

ok, how do i get this hear out, or were do i get one so i can install it? thanks

 

[billison]

so the black nub is the oil pump shaft then? cuz autozone sells it for like 3 bucks, and if that's all i need then i'm set, thanks for the help

 

[68torinogt]

i think it is a roll pin it should just press out but did yo see what i was talking about on the other forums?

 

[joeythesaint]

billison,

Can you micrometer or caliper the shafts of those two gears? If they are different, let me know if the larger one went into your block OK. I am having a biznatch of a time putting a wider-shaft, HEI-distributor (modified with a Pertronix and custom advance) into my 1986 block where I previously had a narrower-shaft, pre-HEI (1978) dizzy. The freakin' housings were different sizes, by almost 1/16", enough that the HEI distributor wouldn't even go through the 1.5" hole in the block. I spent a good part of this afternoon turning it on a lathe.

Now it feels like it's bottoming out on the hole where the dizzy shaft goes in to catch the oil pump shaft; at this point I'm wondering if the wider dizzy will even fit.

FWIW, the dizzy on the left might be a 351; my understanding is, they have a longer shaft to accomodate the 351's taller deck height but they will fit most (Ford says "all" ) 302 / 289 / 5.0 blocks.