I was just looking at the Speedway catalogue and noticed that a lot of the aftermarket valve covers fit 1960 and forward engines. In what way are the earlier valve covers different? My car has a 283, but I only know it was built between '58 and '62, so it might be useful to know.
Early heads had staggered valve cover bolt holes. Later they are right in line with each other. This is top holes to bottom holes.
Also no breather or filler holes. Filler tube was in inlet manifold and the block has a hole cast into it behind the manifold for the breather. Has been discussed in depth on several occasions, a search if you want to find out more.
The Jalopy Journal
