Would it have a notice able idle?
It should work well with your combination. It has pretty fast rate lobes and might be a touch noisy. With exhaust manifolds and not headers, a split spec cam usually works a little better. There is more duration and lift on the exhaust side to make up for the manifolds. @RustyRatRod recommends Comp's 255DEH COMP Cams Dual Energy Cam and Lifter Kits CL20-416-3
A little idle attitude but not a lot.
Depending on which RV cam you have now, There might not be too much difference.
What duration were you thinking 258?
Dang all I was told was it was a rv home grind. What would you recommend
Not enough less to make a difference really.
What would you recommend for my set up
Yep that's a tough one if you don't know what you have in there already. "RV cam" is a generic term. It could be any one of many grinds. You can measure the lift and duration with a dial indicator and a degree wheel. It does get a bit involved.
See post #8 We discuss cams for 318's here a lot. Try "318 cam" in the search box and read through the posts. It's easy to over-cam a small cube engine. I like to use the 220° @ .050 as a guideline for 318 cams in street applications. Yes your better manifolds, dual exhaust , 4 barrel, and 3:55 gears are definitely a plus. You can go bigger if you use a higher stall converter. That will make up for the rougher idle at a higher rpm. That's where big duration cams have issues.
That's a big jump compared to the cam the op picked out. Lumpy idle? I bet it does especially in a 273 even with the 114°. Do you have a stick or auto?
I would ask you next about what you like (or would like) to do with this car.
Any chance you can post a video of your engine running?
Just wondering, Do you have a higher stall converter? If not, any issues with too high of idle speed and jerking or clunking in gear? (Like many do with a rough idle cam)
