Technical Rear seal kit for 51 Pontiac

Does anyone know where to source a rear seal for a 51" Poncho? Ive tried all the normal sources like Kanter and Pontiac restoration, dumb question but is there another option for a seal other than an oem spec ie: could I find something similar on Summit that is semi universal that will work for a 268?

I'll preface this by saying I am not much of an engine guy, so if someone knows of an option I would appreciate the info.

Gracias

SJ

 

You will not find a better seal then this one, http://www.bestgasket.com/engine_catalog_years.asp?YearsCID=1950-54.......[558]

 

Thanks Joe I really appreciate that.

 

If you use one of the seals, follow the directions to a T. It will not leak! The material they use works so good, I locked up a 455 Pontiac by packing it just a little, the second seal I follow directions and it worked perfect, and still it.

Joe

 

Thanks again Joe for that info I just got my order in. You saved me the longest hunt in internet history