Best Intake for a 408
I had a suggestion of something around 260 duration
3800 stall and a 3.91-4.10
It looks like you don’t actually have the rear gearing settled yet? Do you have the 3800 converter already?
Regardless of the gears (they are essentially the same) but a cam with 260°@.050” and a 3800 converter is really not the best match IMO. I’d go down a couple steps on the cam somewhere in the region of 250° or so, maybe 252° or 255° at the most with “that” tc and gearing.
I run 11.44@114 with a 410, 3500 TA tight and 4.10 gear. Air Gap w/750 DP, 246/
[email protected]” solid roller w/TF heads all in a 3200lb deer meat freezer. I run around the street in the 2800-5500 rpm range, really only run it to 6200 at the track. There’s no need to run it up to redline on the street though.
The thing makes so much power in that rpm range and as I only do rolling acceleration runs on the street (as blowing the tires off is pointless) it digs and pulls hard.
I have a ported Victor I intend on swapping to some day. I’ll dial things in and hit the track for testing and tuning. Then I’ll see what my 60’,330, 1/8 1/4 and Mph is as compared to running the AG. I won’t be changing carbs, torque converters etc.
And if the times are better all around great. It’ll stay on. But if I loose 60’, 330’ etc I’ll put the AG back on and never look back. I’ve built for midrange power where I predominantly operate on the street.
The AG I predict will make more power in that range with my setup, will be a little quicker.
If you intend on going with a cam such as you mention and a single plane intake, I’d definitely step up in converter at a minimum.
