Carburetor cfm calculator

I'm sure that most on here know what I'm wanting to do with the car I get. From what I've read, if I go from a 2 barrel to a 4 barrel that the edelbrock performer intake wouldn't be worth the effort. Also, the rpm's that my engine would be operating in most of the time wouldn't a 600 cfm be plenty for a 318? Cylinder heads, doesn't the smaller ports make good power in the low to midrange area? Would cylinder heads with 170cc intake runner's be to big for a mild 318 or are they okay? Cam, single or dual pattern grind? I'm wanting good throttle response and acceleration with good torque in the low to midrange. I'm not worried about doing major upgrades later as I'm 62 years old and don't care about racing anymore. I'm wanting a cruiser that's fun to drive and has a little extra zip. When I first said that it's a budget build, I do have amount planned for the car and engine modifications, gears, and a good exhaust system. If the cylinder heads wouldn't be cost effective to get them redone, then what would be a good choice for a set of heads? I figured that I could build a engine whether it's a 318 or a 360 to perform well from off idle to around 5,000 rpm's. I appreciate all the help, advice etc, but I truly don't think that I need tunnel ram or a blower to reach my goal.

I see you don't care about racing but obviously you want the car to be faster than a stock 318, what power or if you were to take it to the track it E.T. you would like it to do? EG like most modern sedans can do around 15 in the quarter mile so obviously that's what the public want's in there family car. I'm guessing you'd be happy with a low 14 maybe high 13 ? So like 275-325 hp ?

So when picking a head more important than port size is will it reach your hp goals with reasonable cam and cr eg.. stock 318 heads can do about 300 without porting if you went 1.88 360 or port 318 heads you could go smaller cam to reach same aka more streetable or go up in power with same cam., but even before that is where do you want to make power? Sounds like to me idle-5000 rpm so that's 0.9-1 to 1 hp per cid so for a 323 would be 291-323 hp, if your looking for more hp need more displacement or if want power to be made lower rpm.

Here a stock long block low cr 318 making 282 hp with cam 4bbl and headers

318 Long Block Bolt Ons - Tech Articles - Mopar Muscle Magazine

bump up cr you got 300 hp, port or 360 heads your hitting 1:1 hp:cid better heads you could still make 323 hp but with smaller cam etc..