I did search and I found some info that said yes, but it was kinda sketchy?
I have a 351W in my 78 Bronco ( yes W, I put it there ) a buddy of mine just gave me a brand new HEI style distributor for a 302, it should work yes, Thanks...Rick

 

302 and 351W have different deck heights. so to answer your question, no the 302 dizzy won't work with your 351.

 

also the hole in the block are different sizes. found that out the hard way.

 

Looking at the distributors it would appear that the basic castings are the same, as they actually do have the same height and general configuration. But as Mark's post implied, the diameter of the part which goes into the block is different, 1-1/2" on the 221-302, and 1-9/16" on the 351W. But hey-that's Ford.
Also, the shaft diameter on which the gear mounts is larger on the 351, as is the hex recess for the oil pump drive.

 

go figure, oh well it was free, thanks guys

 

Not free but they are on sale:


If you decide to get a new distributor, consider our custom curved Duraspark Distributor built with our new Full Length Oil Impregnated Bronze Bushing. The full length bushing improves timing stability and spark scatter. If stock appearance is not an issue, take a look at our one piece D.U.I. Distributor. Whether you choose the Duraspark or the D.U.I., we curve each on a distributor machine based on your engine combination. Please see them at:

http://www.performancedistributors.com/forddistributors.htm

Also, there is now an excellent installation article on the D.U.I. Distributor on the Ford-Trucks.com site at:

https://www.ford-trucks.com/article/idx/0/358/article/DUI_Ignition_Installation_In_A_Ford_351W_V8.html

 

Thanks for the info