Yesterday I put a motercraft 2100 on my 258 in place of the old Carter BBD. I you have a 258 and have not yet got rid of the Carter drop what you are doing and replace it now. No mater how I tried to tune the BBD it still ran like sh!t. The motercraft is great. Way more power and low end torque.
I just need to find an air filter assemble. At largest it can only be 13 inches in diameter. If anyone has any suggestions here it would be appreciated.