I recently received my order from summit for some wirelooms for my 455. They sent me horizontal ones that go on bottom of valve civers and they would not work because each of my heads have a head bolt that has threads on them for a bracket. So I could not wait for the return process which takes a while, so I drove to summit and asked if they had looms that go on top. They did not have those ones. So I got the vertical ones and they go on bottom of valve covers and they won't work. Power break booster is in the way on my 77 442.
So........ does anyone know where I can get spark plug looms that bolt on top of Olds 455 valve covers?

 

https://www.walmart.com/ip/ACDelco-8...&wl13=&veh=sem

also

https://www.rockauto.com/en/moreinfo...190847&jsn=252

i've been looking for these too