Decent Slant 6 carb, intake, header setup

jbc426 said
I played the Slant 6 game for 10 years. I even had Doug Dutra build my motor with most of his speed secrets for them. It was a great running Slant 6, but it was still a 18+ second quarter mile car.

Save your money, tune your stock motor well and consider the following.

In the end, I pulled it and put a junkyard 5.9 Magnum with a 727 in my car. I set it up so I had EFI, and did the beer keg manifold mod with headers and a small cam.

I got 4 to 6 mpg better fuel economy, it was dramatically faster and it sounded way better.

I've since installed a 408 Magnum with ported Eddie's, a healthy hydraulic roller cam and hooked it to an Extreme Automatic's Stage 2 200R4 with a 3800 rpm lock-up torque converter and 3.90 gears. The car is like Dr Jekyll & Mr Hyde. gets 14 mpg around town, 17+ at 70 mph on the freeway and beat 2 Hellcats in the drag races at Willow Springs a few years back.

I will never go back to a slant.

I drive a 1980 D150 with a stock slant and 2 V8 '95 Grand Cherokees. My wife's GC is a stock 5.2 and I swapped a 5.9 into my '95. Both have the stock Holley MPI. The SOTP power difference between the 5.2 and 5.9 is major. And the difference between both those V8 Magnums and the slant is more like a chasm. I gave the removed 5.2 block away to get it out of the way and I am regretting it. A mostly stock 5.2 GC will do about a 17.5s quarter at a mile high according to a friend's Gtech.

I bought that 5.9 motor for $800 with less than 100k miles on it and it bolted in as a direct replacment. The benefit and satisfaction were immediate and no tweaking required. For a hack like myself, it was nice not having to know and worry about quench, deck height, compression etc.