Thanks for the warm welcome guys. Our heads, hmm.... Alright, we will pour the first sample in about two weeks or less. It has a raised intake port (about 1"), but also has extended intake deck surfaces to make existing cadillac intakes fit. The intake valve in moved inboard .120" and the exhaust out about .060". It'll flow (it did in testing) about 385 cfm at .700 , exhaust about 270ish. It has an extreemly small port on the intake and takes advantage of extreem air speed which will make gobs of low end power. The port is actually a little smaller than an oval port BBC. The short turn into the bowls is about the size of a fruit jar. OK, on the alum intake. You CAN make more power with better runners BUT you end up giving about 300 usable rpms on the bottom with the 2115 Edelbrock. IMO your best bet would be a 425 intake off a 77 or later. This would give more low end and would more than likely, hold it's head up to 3500 rpm or so, which is about all a wood prop can handle as far as I know. Dan, iron heads can be made to flow 320 cfm at .650 or so. To make the job easier, the floor of the intake runner on the heads can be filled from about a half inch at the opening and back to zero at the dip where it turns into the bowls. I use a special kind of epoxy and don't reccomend it for someone that has ever used it or it may end up coming loose and hanging a valve open. We have made almost 800 hp N/A with iron heads and made power to 6600 or more. Keep in mind, that that's with good parts throughout. Ain't no Edelbrock gonna do that. They are only good from 5000 or less. Usually less. Hope that helps. I will tell you this off the top of my head. Stock rods and stock valvetrain are junk. You can put ARP bolts in stock rods and possibly squeeze 5000 rpm out of em for awhile. I won't use them in a numbers matching resto project. I use the Scat ones we sell. Cheap, stout and available. As far as rockers, we make a full shaft roller set up that is bolt on except for moving the pushrod holes in toward the valve about .050". Going from 1.65 to 1.7 makes this need. Bigger cams require the shortening on the guide tops or the retainers will hit from more lift. Using a 500 cfm carb may make a direct drive boat "snappier" BUT BUT BUT, in most cases, your biggest problem with ANY carb is not enough fuel circutry to handle the needs of a Cadillac engine. The stock edelbrocks won't do it, the competition 1413 will with re-jetting and any Holley that needs more than 92 or 93 jets requires aftermarket metering blocks because they are maxed out. Even a 4500 Dom. You can takes the jets out and throw them away and it doesn't change a thing. We used to add the biggest power valves on both ends just to get the temps on the exhaust to a safe level and that's why. A stock Qjet is one of the best all around carb for boats and street use to 500 hp, BUT they need more fuel too. The carb shop on the left coast knows exactly what to do to them and for about $250, they will. We have been using the 1413 Edelbrock, simply because we don't have time to build the 800 cfm q-jets. Potter
