I have very recently installed v-per / John Parkers Stage 2 header on my 1971 145. It fit with no problems at all, increased performance and sounds great hooked up to my 2.25" system with a high qualith glass pack. John does offer them non-coated and without the O2 sensor fiting. I was told by a good friend not to waste my $ on coatings because non of them will hold up in the long run any way. If you want a cool look break out the sand paper and BBQ paint every 3 months!