I am building a 408 for my Duster and it will be street driven and it will be a 4 speed with 3.23 gears with a 27" tall tire.

This is one cam I had laying around and was thinking about using in the 408 since I hear these engine like duration on the camshaft, let me what you guys think.
It is a solid lifter
Intake 540 lift Exhust 560
Duration Intake 248 and Exhaust 258 @ .050
Adv Duration Intake 284 and Exhaust 294

I have some valvetrain noise on my 408 with xe275hl comp stick in it- I could try and replace the suspected collapsed lifter but why not go with a whole new setup while I'm in there.

I'm thinking about a mild solid flat tappet like the one you listed- who makes that cam?

Anyway all I can do to help is report on how the 275 hydro flat tappet worked for me on the street. In my 408 (OD 4spd stick, 4.11 gears, eddy heads ootb) it is a little rough below 2200, comes on pretty strong, and is all over around 5k. the specs are 231*/237* split duration with .525 lift. It's supposedly a 'high lift' cam to give it a little more high rpm power.

In my experience the 275hl in the stroker has awesome midrange 3-5k but the top end isn't spectacular and the performance isn't that smooth lugging it in traffic either.

I suspect you might be a little low on gear for that cam? On mine I'm contemplating going solid b/c I don't mind the adjustment, it's less parts to break (simple lifters), and I should get a little more power all over. I am trying to decide if I should get a nice top end charge to walk on the WRX turbo folks, or go the other way and get a little more smoothness off idle with a little cam since I'm running 1800-2500rpm a lot of the time.

Sorry for the rambling- hopefully its helpful rambling!
Lemme know what you think

radar

Oh, and how much compression and what heads are you going to run?

The heads I have are mild ported set of Factory steel heads with 2.02 valves. When my car was used for strip use only , I used this cam and heads on .030 over 360 with 11.5 pistons KB 190's and with a 4.10 gear the car went 11.80's
On the 408 build I was hoping 9.5 compression with KB356 pistons

The Cam is a Crane Part # 690911

The 275HL requires double springs, so unless you're heads are prepped for them, you need to step down to something a bit smaller.

I run the 274L in my 410 with lightly prepped J-heads. Pretty much the same spec as the 275 with a tad less lift. Still requires double springs though.

Anyway, it's probably the biggest cam I'd consider on the street. I have yet to really flog the motor and wind it out, but it's got plenty of grunt with a stock top end (t-quad on a dual plane). I knowingly compromised some performance to keep with stock appearance though.

I wasn't recommending the 275hl- just reporting on the street performance since it is (like autox said) about the nastiest you wanna go for a daily driver type 408 car.

The solid cam the OP posted is more radical than my HFT and he has less gear and compression than I do. I would assume he had his valveguides cut down for a high lift and can put in whatever spring pack the cam requires. Piston to valve has to be checked anyway, right?

I agree that the xe 275hl is almost a little much for the street but it bums me out that it's all done at 5000rpm. I want my motor to pull harder and harder all the way to my 6k chip, especially if it's gonna run like garbage below 2200.

I ran this cam with these heads for years , unit my chip fell out out of MSD box in the water box and I spun the motor to 8000 rpm and wiped a couple mains outs. So I was thinking to save some $$$ to re-use the heads and cam/lifters and redo the bottom to 408 ci. I was just not sure how streetable this cam would be with more cube's?

I have tried several cams in my 408.....

It reacts as a big block so depending on what you want to do the choice is yours,...but you wil need to go with a higher duration cam if you see a little track.....something in the 255/265* range....

In my motor I have a 255*/263* solid roller voodoo cam. Just before I had a 258*/268*, thought it was a little rough for daily driving....

Dan