Perfect headers for a special needs build
I'm building a '29 Model A roadster with a mid-80's stock 305 SBC. Because of the position of the Vega steering box, I needed the tightest block hugger headers possible to clear it (I still had to cut away part of the collector flange). And, since the engine makes under 200 HP, I am using recommended 2" size exhaust on each side and feel that the 1.5" primary tubes on these headers is an added benefit for that set up. The build quality of these headers is very good, but I am waiting to see if the 1/4" thick flanges will give a good seal to the head.
Next, there are the extension tubes. I ordered the complete kit (headers and extension tubes) without thinking through the performance issues I described above. When I held the extension tubes in position, it was clear that they were too large and might be too close to the fuel line and battery cable. And, after I thought through the situation, realized they could negatively affect the performance of the 305 engine. I did return the extension tubes to Speedway Motors.
