415HP from 318ci IS POSSABLE!!

Well, the car in the avatar is a copy of a 383 in a 400 block, it has 0 deck piston and a .480H comp cams cam. It also has a set of hooker 2" primary tube hedders, the springs are stock HP units and the heads are a set of 452's gasket matched and bowl blended. The rest of the engine is factory stock, I did have a factory dual plane 383 RR intake that was modified, and gasket matched. I had a 750 carb and a 4500 converter and a 4.86 gear. This picture was from 2001.

As for the 318 with the power that you want go to the 322 thread as it will make more than what you want.

As for the heads on a 318 you would be backing up on the street with a 360 head. Use a 318/302 head and use the factory intake valve and use the 67-69 340 exhaust valves.

First without a flow bench your at a loss, as for the home builder your at the mercy of what whoever tells you and you have to figure out which way you really need to go. If your not oriented in porting then DON'T DO IT as you'll be backing up. I don't mean this sarcastic but if you don't have the experience 9 of 10 times the heads won't work, or will have to be reworked to get the results and hoprfully they won't be too far ported. I don't mean this to be discuraging but just being honest. It took me 5-8 years before I really had the hang of what I was doing to a set of heads and to make power. Then when I bought my flow bench I really learned what worked and what didn't.

As for the cams and rollers in general and for street use I've never really thought about it. Most of the engines that I do with rollers are race engines. They make so many good designs now for street and with hyd. lifters why would anyone want a solid roller? Hyd. rollers have there limits, can they make the power that your looking for,..........sure, but with a $2,500.00 limit the cam and lifters are going to take most of the build, besides the machining.

IMO I would opt for a good Hyd. or a small mechanical but the mechanical will require fully adjustable valve train, but then I would use the adjustable on the hyd also. The cam that I'm using is a race only unit that I had custom ground, it needs compression and stroke to really make it work and thats what I did. This cam is not even close to being streetable, but I didn't intend for the engine to go there either. For a good street engine I would do this and you should have the power that your looking for.

Use a 318 block get a set of 85-89 pistons and square deck the block to clean. Balance the componets and use the 302 heads. Gasket match them to 360 ports on the intake(the 302's can be done without welding) eariler versions will need to be welded at the pushrod pinch. Use a K6901 cam from summit and a set of adjustable rockers and the appropriate pushrods. A set of good street hedders and a RPM intake and a 650 holley carb and you should have what your looking for.