Since getting my ‘56 Chevy panel truck on the road, the intake/exhaust setup on the 235 six has had issues, mostly vacuum leaks. The original intake and exhaust manifolds were included in the sale of the engine/transmission assembly, but I decided to use the already mounted Edelbrock dual carb manifold with tubular headers. The Edelbrock intake does not fit well with headers and its ports are smaller than the head’s, so the port alignment sleeves can’t be used, making alignment very difficult. Time to go.
So, yesterday I started the conversion to the factory single carb/exhaust manifolds, which requires throttle linkage and exhaust system modifications. I want to use one of the exhaust header pipes, which requires cutting and welding. I’m still figuring out the carb linkage since there is almost no space between the exhaust manifold and the block, the route taken previously. Also, the cast iron intake and exhaust manifolds must be installed as an assembly, bolted (loosely) together. It’s a challenge to hold this reaching over the high fender.
I hope to finish this tomorrow afternoon - I knew this would be difficult and wasn’t disappointed! The first picture was taken before completion and first drive and is used here for clarity, the second is the culprit and the third picture is of the intake at trial fit.