[Rich Biebel]

292's were never on any production engine. They were over the counter HP replacement heads. I don't really recall if they were angle or straight plug or possibly made both ways but I am going with straight plug only from my vague memory of them.

Bowtie heads came along and that was it for the Turbos as they were indeed called. They were really not very good unless they were ported but were still better than most stock heads.....

It always amazed me that so many 441 heads were so readily available for race cars. They were made in only one year on 350's and in 1970 there were also some found on 400's but those usually had 1.600 exhaust valves if I recall right.

I dug around for a few sets myself as I once raced a '69 Camaro in SS/JA

The 350/255 was a very good combo from day one......Ask Dave Boertman or Bobby Warren....or Bud Rowe....