I just pulled out my 53 to look at the problem. I never really noticed or thought about it before but you do seem to be right. Those A arms are way low. More than anything I think it's a consession to making a kit. Using the dropped (upper holes)suspension setting and/or using short tires just makes things worse putting it almost on the ground. The only fix I can see would be to cut the A arms off the crossmember, shortening the spring and relocating them higher up......but the crossmember is still going to be hanging pretty low and the only fix for that would be a custom crossmember. With that low hood line, it doesn't seem that you have many options. Have you considered a Boxer style engine like in a Subaru, Porsche, or Ferarri ??? LOL !!! Those might be flat enough to fit.