5 mpg? are you sure your fuel pump is not leaking into the crackcase? i second the other member go with the pertronix ignitor it replaces the points and condenser and fits under the stock cap, easy starting and no hesitation through the power range and does not require new plug wires. I have one on my M37 and it starts no matter what the weather is cold, hot, dry, wet even if the truck is hot or stone cold she fires right off every time I believe it was a part # MV161 or 151 I can't remember but it's easy to find.