Originally Posted by waskillywabbit

A 20+ year old tired motor will run as such. Tune up, rebuild, motor swap or drive downhill.

Putting header etc on a tired motor is like putting a milk bucket under a bull.

:wabbit2:

Originally Posted by ChefYota4x4

Hey Bob, how you been?

Ya know, I guess people find different results... I actually don't feel much of a difference at all, other than VERY top speed(maybe 2-4MPH depending).... with the Stock Exhaust and 2" to CAT and then 2.25" to the Muffler and then 2.25" out the back.... Compared to my LCE and 2.25" Exhaust that I had. In fact, I feel a lil more low end torque with the stock tri-y cast mani. Seems to have that lil more backpressure it needs. Anyway, I still plan on putting my LCE back on, but with 2" to the CAT and THEN 2.25" out the back.. Plus, I'll have my 02 Bung welded onto the Header Collector, WAY closer where my 87 was factory... (which is on the mani before collector on the stock Manifold).

THAT HEADER DID sound sick though,...gotta say! hahaha. I think when I add that lil backpressure back, along with letting it flow out of the head a lil better...it'll make a difference that I can notice again. Giving me low end torque and a lil better top end, that's the goal.

Also.... again, I hear that alot..and I'm not doubting what people say.. But my 261 CAM WAS BY FAR the best power gain that I added. RIGHT OFF THE BAT I gained almost a gear on the hills I normally had to push it up in 3rd on, which now I could do at 4th and even 5th. Adding the 4.30 Gears to that, on 31's, rather than 4.10's? EVEN BETTER! The header and CAI? Just didn't FEEL IT, ..but sure heard it.

Not EVEY trying to argue, Bob, lol.... Just sharing my personal experience. Seems they range WIDELY in ''things noticed" upon installing/using, ya know?

Originally Posted by 85TurboRunner

for gearing read the vin plate on the firewall it will give you the factory code at least, a little searching will help you decipher it.

Another easy way to tell is to pull the rear shaft and if the end of the pinion is painted pink you have 4:10's.

There is also a color chart on the interwebs with the different pinion paint colors for gear ratios.

I haven't looked them up in a long time and I'm not about to start right now.

Anyway you most likely have 4:10's with the 33's and its making your truck a slug. Do all the engine mods you want but they won't compare to proper gears.