How much power do engine mods yield?

kesteb said

There is an engine build matrix on slantsix.org. Pick one and follow it. They are proven recipes.

A quick and dirty recipe would be a stock 225 with a Supersix manifold, Autolite 2100 1.08 carb with #48 jets, recurved distributor with initial at 15* btdc, 30* total, all in before 3000rpm. A 2 1/2" exhaust from the stock manifold to the bumper. A TransGo shift kit in the transmission.

The 2 biggest improvements were the exhaust and the shift kit. This combo drop 2 seconds off a '73 Duster.

Click to expand...

Kesteb,

Thanks for that information. That is exactly the kind of plan I think the O.P. was looking for.

Back in 1963, we took a 225 slant six that was nearly new, in a 1962 Dodge Lancer and installed a Hyper Pak 4bbl intake manifold and carb, milled the head .100, and installed the Hyper Pak cam and a 3.55:1 rear gear (with Atlas Bucron tires,) but no header; the header wouldn't fit... It hit the starter solenoid, so we left the stock (tiny) exhaust on it... but, removed the muffler...

It ran 15.88 @ 89 mph. Beat a lot of V8s with that car... It had a 904 with a stock torque converter.