Let me add my 2 cents, using a 1 7/8 header on a 529 that you plan on using 2 1/8 exhaust on, gave you a lot of useless info. The HP/TQ will be down, the A/f will be off, the timing won’t be right. The good news is the oil pressure, the vacuum shouldn’t change, and you got to see if it leaked. I ran a 512 with that same cam and when I shorten the 2 1/8 headers from a 32” primary to a 28, I pick up 18hp. My advice is put the cam back at 108, put it in the car and go have some fun.


Joe