moregrip

iTrader: (8)

Darton is local in Carlsbad, so that's probably why. He uses them and Hank the Crank.....all his pcs look quality on the website.

Funny about that place though, I drive by twice a week to just see what I'll see.
There's always a big Ford F250 or 350 parked on the side......never see any Chevy's, not one, not ever, weird......

LS1S10

Sorry guys for the late reply, just walked in the door from Savannah. It all sounds pretty good and i'll probably pick from either a 402/408 or a cammed new 6.0. From what it sounds like i should be okay with emissions, i still got cats and i dont plan on taking them off any time soon. And i odnt have to worry about having to radical of a cam because i want all my power in before 6K rpm. The Radix sounds good and im sure alot of people are happy with them, but so far i dont think its going to be the right step for me. I could probably come up with the same power cheaper with a cam/heads 6.0 and have a fresh motor. Now all i guess i gotta do is start looking for built tranny's and a 9.5/10.5 14 bolt

BTW i kept check of my gas mileage to and from Savannah.....got 15 mpg avg with the air off and turning 2500 rpm's the whole way doin 75 mph. Not bad i dont guess....but certainly not great. Burned up 2 1/2 tanks of gas round trip....w00t!

snoman

You hit the nail on the head, emissions testing. Engine swap and a cam is almost a sure bet to fail it. I would suggest super charging the 5.3 (it will still pass emmisions) and deeper axle gears (4.56 minimum or deeper as you said it is lifted) as the 5.3 needs to rev a bit. These too things together would really wake the truck up big time!

Texas Terminator

There's No Substitute For Cubic Inches.

Visionxorb

i dont think a 408 in cali would be a problem, ( since i live here ive had experiance with a 383 in my old blazer ) the problem is normally visual, as long as the 408 looks like the regular motor and any "race parts" are carb aproved its all in the compression (NOx) cam and tuning. since the test is based on PPM ( parts per million ) and percent, its all ratio, a 408 has more crap comming out it also has more non crap coming out if you get my drift.

LS1S10

Well, i very highly doubt that our little city of Rome is going to get California emissions anytime within the next 50 years....so i guess all i have to worry about is having codes come up if they scan it through the diagnostic port and visual? If thats all they do in ATL then i guess i dont have nothing to worry about. All my mods so far are CARB approved and i'll just be swapping those over to the 402. As far as cam's go...i highly doubt i'll go over anything bigger than a 220 on a 114, maybe add 1.8's for more lift so the 402 can breathe. I'd like to see anywhere from 350-400 rwhp and 450 to 550 rwtq.

moregrip

iTrader: (8)

hows the long term dependibility on those strokers?

I know people are having oil consumption problems with the 427 and up.....not sure about the 402/408, anyone have 100K on a 408?

LS1S10

I haven't heard of anyone having that many miles on a 402/408 yet. I don't see why it would be any worse than the dependibility of a regular 6.0 if you dont wrag the hell outta it. The rod ratio looks pretty good on a 402, so i don't think there would be that much more pressure on the wrist pins. I would expect them to last just as long as a standard 6.0/5.3/4.8. Given you don't have radical valvetrain thats going to be hell on springs and the build up is kept on a slightly milder side. All im really shooting for is a 6.0 with a edge over heads and cam and without the expense of FI.

moregrip

iTrader: (8)

no worries, I was just looking at your setup with all the 4x4 gear and thought dependibility would be a purchase point.

I'm not yet convinced the 402/408 is every bit as dependable as a 6.0/5.3/4.8.

I'd like to see some high mileage motors with a compression test or a leak down. Heck, a few solid running 100K motors would convince me.

whats the stroke on a 402/408 (the difference in cubic in. being the bore correct?), is it a 4" or 4.125"?

LS1S10

It's a 4" stroke motor on both the 402 and 408...the 408 is bored .030 over, but i would rather opt for the 402 so i could have the possibility to have a few rebuilds and possibly be able to clean up some if something happens.

Im pretty sure they should make it to 75K to 100K miles.....after 100K miles though, i don't know if i would even want a stroker motor long after that without being refreshed. Even if you have to overhaul it after 100K miles....thats doing pretty good, but then again thats my opinion. For all we know, they could last to 200K....highly doubtfull but nobody has that many miles on one yet. So i guess we'll have to wait and see.