Hey guys!
I just joined today and after reading through this forum it seems there is a lot of knowledge here.
I know this is an old thread but i was hoping to have new light shining down on my issue.
I have a '78 302 engine that i had all the engine work done to that is going in my 65 mustang.
The issue I ran into is the harmonic balancer (28oz) is the original 78 302 one and I can not find a crank pulley anywhere. NO parts stores can order them, find them and even many yards I called have no listing nor can i find one.
I have a 65-66 water pump on it so that my radiator hoses r on the passengers side for my radiator. the timing cover is the 78 ( timing marks r the 10-11 instead of the 65-65 1-2 oclock).
Does anyone know what year I can interchange from so i can get the proper 4 bolt pulley?
If i need to get spacers to align the pulleys up thats fine. Aftermarket is fine also.
This is holding up the project.
I have been through every sit looking at billet ones. etc..
HELP ME PLEASE!

 

How many grooves is the pulley you want?

What diameter?

What depth? I.e. distance from mounting face to front of pulley.

 

Either single or two groove. Diameter, well i never got to see the original pulley but i would guess 6"-8"?

 

Any 70's 302/351W/351C/351M/400 crank pulley will work, they're the same part (offset) for all, but most are three sheeve pulleys. The single and double sheeves are harder to find. I've got a matching pair of single sheeve pulleys if you're interested, PM me.

 

I have a crank pulley off my 78 motor but going to use serpentine belt setup. It's bead blasted and primered with etching primer I think its 3 or 4 groove though. Email me if interested @
Gus.rivera@yahoo.com

 

can u post some photos of it

 

I'm still waiting for you to send me your email address to send the pics of the pair I have.

 

Jbatzel429@gmail.com

 

Pictures sent.

 

This is the same problem I'm having. I have a 302 with a 4 bolt harmonic balancer.

I can find only stinking 3 bolt multi groove pulleys for my PS upgrade. I ended up buying a new 3 bolt harmonic balancer for $90 to fit a 3 groove 3 bolt pulley.

Where the hell are all the 4 bolt multi groove pulleys? And were 4 bolt primarily on trucks and 3 bolts on cars?

 

Not an authority, but I recently went thru a similar situation and found the crank and water pump pulley come in sets so suggest take the part number off the water pump pulley and purchased a crank that matches. Found a seller on ebay who had a selection of 302 engine pulleys so I emailed him with the crank and water pump pulley part numbers and he responded with a list of options of either purchasing the crank pulley, or water pump pulley to get a match set; best think I could have done, no more washers and or spacers to get the proper belt alignment. Oh what an improvement!!

 

Interesting, Thanks for the tip.

 

Let me know it matching pulley becomes an issue, believe I kept the seller's ebay website??

 

You can get a 3 sheeve crank pulley off any 70's 302, 351W, 351C, 351M or 400. They all used the same 4 bolt pulley. The 3 bolt- 4bolt pulley difference changed between the 69 and 70 model year for all vehicles, except for the Bronco's. No difference between cars and trucks as far as 3 bolt-4 bolt

 

Thanks Baddad

Now I'm going nuts. .... 2 weeks ago I couldn't find a 4 bolt 3 groove crank pulley on eBay anywhere, , now I looked tonight they are all over the place. Sheesh