Need a plan - component selection for restoring 68 340 that runs on 91 oct

Now How in the world did I miss that!!,lol.Wait what thread am I in. You have the A-vert as you say,an original FormulaS car right? Lemmee go check........
HYUP there it is right n post #1,lol

In that case you are gonna have to be more careful than ever with co-coordinating the combo, cuz the clutch does not have any built in Torque Multiplication;whatever torque goes into it, about the same comes out of it.Further the 3.23s call for a torquey engine because the available TM is just
3.23x2.66=8.59... and with 26.5" tall tires, this gets corrected to 8.59x12/13.25=7.78 .......
which is pretty flipp'n dismal, lol. It would be all too easy to fubar this combo up with a long slow lazy cam like that 2899205
So now I have to re-guess that the 220 cam is probably one size too big ..... depending on the design. A fast-rate 220 will still be OK, but a slowrate 213 could be worse.
See a fastrate 220 could be 260 advertised, and a slowrate 213 could be 257. Then you factor in where they ACTUALLY, REALLY REALLY, close, and you find out they are both 265s or 268s who knows. The thing is both will make similar pressure, and could idle similarly, yet the bigger cam might make 15 or 20 more horsepower..... with no penalty in fuel economy or low-rpm torque! Winner!!
BTW
You don't want a 114LSA cam; those are designed for the wide ratio Torqueflites, and are pressure bleeders. Nor do you want a 112,or even a 110. In your application with about a 1500 rpm powerband requirement and one gear to 60mph, Ima thinking even a 108 could be a skip-over. And that means that you can step up a size in cams to about 225/108, or a 230/106 fastrate.
Lets have some fun; To recap
>that 220 fast rate could be a 260 advertised, and an actually not leaking intake at 265, so lets call it a 265/273/110 ok ,that, at split overlap, would have an ICA of 60 and overlap of 49*
> now the slow one could be exactly the same
> next How about that 225/108 cam. That could be a 267 advertised, but no longer bleeding at 272, so lets call it a 272/280/108. Ok again at split overlap, the ICA would be 62*and overlap of 60*
> finally the biggest, the 230. This could be a 275/283/106 And again at split overlap the ICA would be 64*and overlap of 62*

Now lets check this out; The ICAs vary from 60 to 64, so basically they could all be installed at 62*!!! Lets say the rest of the engine can keep up, and then
the 213/110 makes 285hp. And lets say then maybe
the 220/110 makes 300hp,and
the 225/108 makes 325hp,and
the 230/106 makes 340hp;Jus saying.
Ok so with the same ICA of 62*, they are all gonna want the same Scr, surprise #1.
Next the cams with less overlap will make better city mpgs, than those with the more.
On the hiway the difference is much less.
So pick your poison; 285hp,300hp,325hp,or 340hp.......................Boy I wish it was that easy