250 HP Slant Six - No Turbo

I'm still confused on the definition of these "old school" tricks? If anything you want to look at what technology has to offer. I run a TBI off of a Megasquirt, along with a Jacobs kit fed by the square waves translated by the HEI. Distributor is locked except for the Tachometer input, this means I will go to the Ford EDIS system on the 170 Supercharger. This means simply keeping the Megasquirt in the car where it already is, along with the e-pump in the tank, 1/2 in fuel lines, and relays on my inner fenders. The Megasquirt also has a great set-up for Nitrous if you hit 260rwhp and want to tip it over....
The crank is also like 65lbs (?) so lightening it will be a great start on the rotating part. One thing about the 225 is that the slant was designed to be a 170, as a prospecting engineer I shutter at the idea of adding a 1in stroke on something not designed to use it (allpar.com, Interview). The K1 rods are much lighter along with forged pistons for a great deal. Compression will be important, and if your going to be dead set on NA I would look into jacking it up and using a water injection system to keep it to pump gas. This cannot be an after thought, cam will love or hate it. Erson is great and will give you a good deal, just have a talk with them about what you have done. Bigger isn't always better, but, the EFI will help against vaccum problems like a carb would suffer from.
I wouldn't buy a hyperpak intake, though I love the look of them. If your a fabricator, I would make something similar to it but with a log style. I've made mine out of sheet metal and have 14in runners. If your not a fabricator, than look at the aussie intake manifolds. The intake and exhaust will be important, but won't be the only parts neccessary. Plan on making your own headers and having them coated, or else I hope you know someone.
So, guy who has to pay his own bills and build the engine. It's possible if you can make some of the pieces AND read up on what technology has to offer. I've made a simple list that combines some of the cool stuff I can do with the Megasquirt and combine some of the "old school" techniques.