273 for early A

The cam you linked in post #1, does not match the card in post #11, which also does not match the P4452761Kit
Oh, I sorta see what you did there,sorry;

Product Line: Howards Cams Hydraulic Flat Tappet Camshaft and Lifter Kits
Summit Racing Part Number: HRS-CL711381-10
Duration at 050 inch Lift: 208 int./214 exh.
Advertised Duration: 255 int./261 exh.
Lobe Separation (degrees): 110

This P4452761 cam-kit will run well,at 9.6Scr, and the 54* of overlap will have a nice lil lope.The paper says 50* overlap ;which would be right for a 110cam, while the math says at 108 it's 54*
To make best use of it, those 54* of overlap demand long-tubes. The compression plus power durations at 108LSA, total 234* compared to 242* with the Howards. When both are installed at 108, the compression distance is nearly the same so the only thing the 761 gives up is smooth idle and fuel-economy; which, IMO, is a good trade. The [email protected] compared to the [email protected] is ~2 cam sizes bigger, moving the power peak from ~4700 to ~5100, and that is where the power comes from; I get a potential of about 20hp on that difference; with at 9.6 Scr(compared to 9.5 on the Howards) almost no loss of low-rpm torque, except what the typical Mopar long ramp cam brings to the game. Depending on your altitude, both 9.5 and 9.6 Scr might require premium fuel at full-load.The 761 may not like the factory TC, so in your case, you can solve the TC to crank issue with a custom 2500 to 2800 TC, depending on your final Scr, and how close you can cheaply/affordably get.
>I like that 761; it's a heck of a cam in a bigger engine with a manual trans (closer ratios) but in your application, I fear it might be too much. Getting the Scr just right will be very tricky, and how often are you gonna need the extra ~20hp at 5100? Ima thinking an extra 20 ftlbs at stall would be waaay more useful to you

The 272H10 is measured at .004 Tappet lift, so cannot be directly compared to a Mopar at .008, or the unspecified Howards. But that's ok, cuz IMO it's a lil wrong for your combo anyway.If I estimate the .008 events, I get a kindof in-between cam to the other two, but with really long acceleration ramps. And it's a single pattern cam with no compensation for the Mopar exhaust ports. It may be a good cam in a certain combo, but I think not the best in yours.

However, if you already own it........... it might not be so bad as a starter cam. Plus you get to degree it and find out what it measures at .008, so then you can compare it to other .008s. And then if you don't like it, at least you will have a pretty good idea of what next cam to get. Plus it will have a lil idle-lope, about like a stock 340.
And that's my opinion.

Actually, my opinion
is to target a 9.5 Scr with a tight-Q, see how close you can affordably get, then order the cam that takes best advantage of that. The Intake closing event will be around 58* so you can build a combo around that, as big or as little as you want, or can stand, just by manipulating the intake/exhaust durations and overlap period. You can go from mild to almost wild, with just a lil lope to quite a bit. Maybe there's an off-the-shelf cam, and maybe not. But the 58* will get you a cam that is in the ballpark, especially if a fast-rate. As said; the 2bbl flat-tops might get you what you need. At .020(3.4cc) in the hole, [email protected], is easy(cheap), with 57cc heads.