Well first off im 17 and i am building my first car a 72 Chevelle which will be my daily driver as soon as i get it running. And i chose to go with a 454 which is very smart on my part considering the $3.24 a gallon gas prices but i dont care. So i bored the block .40 over, all the internals are balenced and blueprinted. I went with forged flat top pistons 8.5:1 compression, Competion Cams Extream (555 exh 552) in cam, com cams roller tip rockers (1.72r), comp cams magnium 1 piece push rods, edelbrock alumnium heads, Air gap intake, holley 750 double pumper which was re jetted to somewhere around 780cfm, hooker comp headers and the rest flows through an 3 in exh and out 70 series big block flowmasters. And i built this enigine with the help of some of the guys at a local speed shop and i was wondering what kind of power im looking at and what kind of milage to expect as if it matters. But I appreciate any help and opnions. Thanks  

what kind of edelbrock heads are they? compression seems a tad low for that cam,but it should work pretty good,im guessing 450 hp at least.good luck with it  

They are the victor series heads  

victor series heads have very large port volumes,too large for your combo....you will lose torque all across the board because of poor port velocity,id suggest going to a performer rpm head with the 290 intake port,also has 110cc chamber which will bump compression up a bit,its a win win situation with these babies....hope this helps  

I totally agree, the victor series heads are for all out drag engines with 12 to 1 or higher compression. With those heads, your low compression and the cam you picked your bottom end is going to be very weak. You could also sell those aluminum heads and get a set of 049 or 781 stock oval port heads they are cheap. Even with low compression those heads can make 450+ horse power with a little port work and larger valves.  

A friend of mine has i think they are AFR heads with a 115cc chamber and 320cc intake runners. i dont rember the valve size off the top of my head but hes getting rid of them and pretty cheap to so should i buy those heads? Will i be better off with those, thanks.  

If they are AFR heads with the 305cc intake ports they would be better than what you have, but if they really are 320cc they are still too big for your combination.  

AFR heads are great performers,but for your combo,the 320's are still too large.if they were the 305's,they would be perfect.im pretty sure AFR doesnt make a 320 cc head,they might be the 325 cc head though.  

I dont really under stand the whole intake CC principle, could someone please explain?  

the intake port volume on cylinder heads is measured in cubic centimeters (cc's).as a general rule of thumb,the heads that have the best average flow through the lift curve with the smallest intake port volume are deemed the most efficient.hope this helps  

Ah i see, thanks for explaing it, now im sorry to ask another question but i plan on buying a Vortec supercharger in the future, will the set up i have now run well with the supercharger?  

I was wondering if you had plans for a blower when I saw the compression you chose and the fact that you had forged pistons.Those heads would work with the blower, but they are still too big in my opinion. A friend of mine has a 454 in a 76 Trans Am with the Vortec YS supercharger he is using AFR 305cc heads his engine puts out nearly 900 horsepower. Lots of crate engine 540s use the AFR 305s and have good horsepower and awsome throttle response. You just don't need a intake port with that much volume.  

not if you plan to run a blower you dont.........  

I would find a nice set of oval port heads, not the "peanut port" heads, do some port work and maybe use larger valves if you so chose to. These heads would cost you less to get ready the what you spent on those aluminum heads by far. That is, if you stay with 8.5:1 cr. Go up to 10 or 11:1 cr and you might be in the ball park for your Victor heads.
 The power ratings to depend on several other factors....open or dual plane intake, what type off ignition you are using, etc.
the feels like power will depend on yourr rear gears, how your transmission is set up, (torque converter, etc.) Try Desk Top Dyno software, it will get you closer to knowing what type of parts combination you should use.  

First off, you are going heading into the complete opposite direction of building a daily-driver let alone a street car!

370cc ports with plenty of cam for 8.5:1 (or even lower) compression will make for a dog of an engine. Low-end will be non-existent and the power-band will be unusable. If you want to make those heads work think of about 565 C.I.D. or maybe a 509/512 with a pretty significant amount of boost. But if you go these routes you will probably make more power than the rest of your car can handle and spend more money than your pocketbook can handle, so the best advice is to change heads to something A LOT smaller. Since you have 8.5:1 compression or less a blower is a fine idea but you really need to re-think the idea of having this car be your daily driver no matter what the scenario is!