2 1/2". And thanks.
Holley is pretty straightforward about where to put the O2 sensor. From page 8 of their manual:
"Locate a position for the oxygen sensor as close to the engine as possible. The oxygen sensor should be
mounted at a point where it can read a good average of all the...
My '67 300 with a 440 has a full TTI exhaust from headers all the way back, with an O2 sensor bung for my Holley Sniper. No issues after three years. Louder than stock but nowhere near obnoxious and does not drone at highway speeds.
Highly recommend TTI. The quality is remembered long after...
If you set the ride height too low, you may experience tire rubbing when the front wheels turn to the right or left.
And make sure you take the weight off the front wheels before adjusting the torsion bars.
Which hoist did you get, @cbarge ? Please share photos of the assembly and let us know how it goes. I hope to get one myself one day and am very interested in your experience.
The 440 in my '67 300 was recently rebuilt with flat-top pistons. It's bored .030 over and has 516 casting heads. Stock CR was around 10:1 and I am thinking it's about that after the rebuild. Timing at WOT is 33 degrees; cruise timing is 42 degrees at around 2500 rpm. On 93 octane pump gas...
Here are two photos of my painted spacer/gasket sandwich. Also, if you look carefully at the top of the studs, you can see the Allen wrench holes.
BTW, I drove the car to the post office yesterday. On the way there water temp was 188+- two degrees and MAT stayed between 98 & 100. OAT was...