Purpleshaft .484 Cam in a 273?

I had the 292/508/108 in my 360. That's the next bigger size. I yanked it before the summer was out. It needed 4.30s with the 2.66 low 4-speed I was running. And I had to slip it out like a gutless Mustang; even with 11.3 static cr.
40 bucks is 39.95 too much.

Check this out! Your 284Cam in at 102*
Static compression ratio of 10.25:1.
Effective stroke is 2.57 inches.
Your dynamic compression ratio is 8.17:1 .
Your dynamic cranking pressure is 164.30 PSI.
V/P (Volume to Pressure Index) is 106
Here we have the Scr set to achieve the maximum Dcr and pressure for pump gas;And the VP is down in slanty territory.
A good strong street VP to have is like 150ish. A 410 stroker with a small street cam pulls around 165.

Here is the turd I was running; 292/508/108 cam in at 104
Static compression ratio of 11.3:1.
Effective stroke is 2.64 inches.
Your dynamic compression ratio is 8.60:1 (aluminum heads).
Your dynamic cranking pressure is 175.57 PSI.
V/P (Volume to Pressure Index) is 143
I call it a turd cuz the bottom end was so soft that I had to run 4.30s to satisfy that, which made hiway cruising very uncomfortable, and I live 20 minutes from the closest next town. It ran great, awesome even, from 5000 to 7200

I replaced that cam almost right away with this one, a 270/276/110 in at 106
Static compression ratio of 10.9:1.
Effective stroke is 2.86 inches.
Your dynamic compression ratio is 8.91:1 .
Your dynamic cranking pressure is 183.76 PSI.
V/P (Volume to Pressure Index) is 162

This pulled 2.76s like nothing.

I currently run a 276/286/110, and it looks like this
Static compression ratio of 10.9:1.
Effective stroke is 2.79 inches.
Your dynamic compression ratio is 8.72:1 .
Your dynamic cranking pressure is 178.73 PSI.
V/P (Volume to Pressure Index) is 153

Notice the progression in VP: 143 was soft,162 was very strong, and 153 is up the middle.
153 is a good compromise for a 360 having enough to pull a starter gear of 9 or 10, yet lots of top end to pull 6500rpm with a good amount of power. Free flowing heads and exhaust lets her wind out to 7000 easily enough.

In a 273 IDK, but I for one wouldn't consider a 284.......at all. I wouldn't pay a nickle for it. There are just too many compromises needed to satisfy it. Compromises like,
With an automatic; a very-high stall TC, and at least 3.91s to get the rpm up.
And with a stick-car; a lot of clutch slipping to get moving, and even more gear, to get the rpm up where it needs to be, cuz you don't have a TC for TM help.

Now in an earlyA, you can get away with a bit more cam, or less gear, on account of the weight difference. At the time I had the 292 my raceweight was 3650-me in it. The EarlyAs would probably be 400ish less. Currently I am at 3467 me in it, hence the smaller cam is all I need.And I run the 3.09 low trans so my starter gear is up to 10.97. All problems solved.

Good luck with whatever you choose