To be able to use 15s in the back im going to grind a little bit of the calliper i seen it done before.

 

I broke more than 8 4l60s so i got a deal on a l80 and putt that one on I just have a base tune from flaco. Im going to get a wide band tune tomorrow hopefully.

 

Who the hell did you have "building" your 4l60s? Cause I sure as hell wouldn't use them ever again.

 

four of the trans were from diffrent companies.The other trans were made good but my truck wheel hoped a lot and it was to low he build good trans i guess i have a heavy foot and used to down shift it too much.

 

Back to the thred what shoud i do about d cam my truck is a daily driver so i wount mind saving some gas.

 

There's no such thing as too big of a cam, just too low of a stall!

I wouldn't say the cam is too big for the engine, but I would say it's on the verge of being too big for a heavy truck, especially one you dd. If it was track only, the cam would probably work with an even higher stall, but for the street it's up to you how much "driveability" you're after.

How does the current engine/stall combination suit your daily driving? If you say "sluggish till 4000 rpm, and only manage 7-10 mpg" then I think you can see the writing on the wall...

I think your combo really favors track use, which will always be at odds with driveability and fuel economy, but it's all up to how much of one you want to sacrifice for the other

 

Get headers on, get it tuned right, and get some tires that will hook and 12s should not be a problem at all.. That motor needs to breath specially with a cam like that and stock manifolds are killing that thing.

 

gotta agree, also your cam is fine, depends on how tight the stall is also, i would have went 3" exhaust but since youre heads arent reworked 2.5 is fine

 

Be sure to go back for a retune after the long tubes are on . . . and get the 2nd gear shifting fixed !

Remind him about the cold weather startup problems that you're having.

 

Yeah im going today at 6pm il tell him.