What is the best camshaft for a stock bottem end 318 but will be using a edelbrock rpm air gap intake and 650cfm carb. Will be putting stiffer springs in was looking for .450-.480 lift any suggestions. Thanks

 

If it was mine, I would contact one of the major cam manufactures such as comp cams, etc. and ask them. Its going to be based on useage, gearing, manual or automatic, stall speed, as well as carb intake, etc.
But again, one of these is going to be best qualified to help you make a decision on cam selection.
Good luck and let us know how it turns out.




edit to add a few more important factors, 4wd or 2wd, factory exhaust, dual exhaust Long tube headers, shortys, or factory manifolds?

 

Yes definitely, more information would be helpful, but as stated, the cam manufacturer will be able tp better answer your questions.

 

First
Air gap with stock bottom end??? they like more compression and rpm but easier with 360 or 400 stroker and usually a bigger cam with a gear change and converter
if you are not doing all that double think the manifold choice
second
1.7 rockers on the intake only is equal to one size larger duration cam but without loosing off the line grunt or rock crawling ability
the best way to gain more than that 1.7 (area under the lift curve) is with an inverse radius grind
They close the intake (and other points) about 4 degrees earlier than flat flank grinds
so you can have your cake- low end- and more top end too
go hear and fill out the appropriate form- do it even if you are going to contact some other camgrinder- get all your info together
http://jonescams.com/cam-recommendation/
BVVC on lift at you can tag a piston

 

comp cams recommends there 20-745-9 264/270 duration with .480/.480 lift and that spring pressure is 280-385lbs

 

Don't send a boy out to do a mans job
inverse radius profiles
.006 .050 .200 lift 1.6 1.7
260 210 132 .500 .532
260 208 128 .523 .556
4 degrees less than comp on the seat and a bunch more area
If piston/ valve clearance is a problem lift could be reduced without losing much
If you like 264 duration you could get
264 218 139 .544 .578
but that is obviously a much bigger cam than the comp
your compression and fuel will determine your intake close point and from there centerlines and duration
just bvvc and less is more
here is a 264 with piston clearance lift-- compare the .200 and .050s
264 212 128 .496 with stock rockers
if you have low stock compression you could run 256 and still have more area than the comp
in fact you can get 480 lift with a 256 cam (2.4 @.050) with flat tappet .904 hyd lifters