Originally Posted by mrhino (Post 5587947)

Im with Centipede on those TBI heads. I been planning the engine build for my crew cab and actually went looking for those heads. iv done quite a bit of research on them. heres what iv found. There junk they dont flow for **** and that big hunk of cast right in the middle of the runner just flat ****s up the flow. at the upper rpm range, most guys throw them away. now that iv said that. these heads work great for low end torque. the swirl port actually works at low rpm about 3500 and under . and if you clean up the exhuast port it flow pretty good to. The set i have have been surfaced and mild pocket port done there are a small 58cc. and yes i will be running a dished piston. Im hoping for some awesome torque numbers and great fuel mileage. I guess we'll see how it goes.

Dont give up on that head just yet. I cant wait to get started on my engine. So keep us up to date on what you find.

Oh its just my opinion but I wouldn't run a edelbrock on anything. plus it might be to big. Im willing to bet if you got a smaller carb it would run better and accelerate better to. good luck to you

Originally Posted by Firebirdjones (Post 5588007)

3.08's and 33's aren't a horrible combination, definately not the end of the world. You won't be setting stop lights on fire, but still very driveable.

I had an 84 blazer with 3.08's and the 700R4, and actually had a bone stock goodwrench 350 in it. Drove that for years, wasn't all that bad with the 3.06 first gear. Was just a driver though and was never interested in changing much else on it.

My current 72 blazer had factory 3.07 gears, I threw 33's on it. 350 turbo only had a 2.52 first gear, and the 355 was mild, forged flat tops, small RV type cam, performer rpm intake and 750 holley. It actually would get up and go decent considering. I modified the trans governor to hold the part throttle shifts longer for around town driving which helped alot with stop and go. Still knocked down 13 mpg city and 16 mpg highway.

Switched to a 6.0 LS engine and 4L60E, left everything else alone for a while. The 3.06 first gear and 1.62 second pepped things up, and it would actually lay some rubber with the 33's.

After a year of that I swapped in a set of 3.73's so I could enjoy more of that 6.0 and I think the setup now as a whole is about perfect.

Gears are funny like that though, you could put 4.88's in a 6 banger and feel like it would rotate the earth :lol: I have a couple other cars here with 4.56 and 4.88 gears, heck of alot of fun.

Originally Posted by INSIDIOUS '86 (Post 5588119)

How would a smaller carb go faster? That makes no sense even 305s make more power with a 750 vs a 650. A cylinder head that is designed to help torque for a STREET car that's driven daily with a small cam and and small carb or injection would benefit. Otherwise in an out of stock application or anything that isn't trying to max you mpg on the street the heads are pretty much worthless.

So vortechs and zz4 l98 heads are about the best in terms of factory performance and price. The l98 head would be the best with the 58cc chamber and 175cc runners
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Originally Posted by INSIDIOUS '86 (Post 5588119)

How would a smaller carb go faster? That makes no sense even 305s make more power with a 750 vs a 650. A cylinder head that is designed to help torque for a STREET car that's driven daily with a small cam and and small carb or injection would benefit. Otherwise in an out of stock application or anything that isn't trying to max you mpg on the street the heads are pretty much worthless.

So vortechs and zz4 l98 heads are about the best in terms of factory performance and price. The l98 head would be the best with the 58cc chamber and 175cc runners
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Originally Posted by INSIDIOUS '86 (Post 5588119)

How would a smaller carb go faster? That makes no sense even 305s make more power with a 750 vs a 650.

Originally Posted by INSIDIOUS '86 (Post 5588119)

A cylinder head that is designed to help torque for a STREET car that's driven daily with a small cam and and small carb or injection would benefit. Otherwise in an out of stock application or anything that isn't trying to max you mpg on the street the heads are pretty much worthless.

Originally Posted by INSIDIOUS '86 (Post 5588119)

So vortechs and zz4 l98 heads are about the best in terms of factory performance and price. The l98 head would be the best with the 58cc chamber and 175cc runners
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Originally Posted by BigBlocksRule (Post 5588542)

Swap some 28" or 29" wheels/tires onto it for a test. It's not all in the diameter's play into gearing, big honkin' tires and wheels are a lot harder to turn because of their weight, too!

Originally Posted by BigBlocksRule (Post 5588542)

Swap some 28" or 29" wheels/tires onto it for a test. It's not all in the diameter's play into gearing, big honkin' tires and wheels are a lot harder to turn because of their weight, too!

Originally Posted by CentipedePerformance (Post 5588250)

I am absolutely not going to tear the top end back off this motor. I work full time, and am a full time college student. It took me a week to get it back together, all the while riding my Honda XR400 to work and school. Not happening. If I am stuck with what I have, I will just deal with it. I am not looking for a race motor, just a solid truck motor. I agree, vortecs or L98s would have been a better choice.....for more money. If money were no object, I would have just swapped in a 6.0/4l80e and associated electronics and left it stock, but I built it with what I could get, for a price I was willing to pay, with a realistic power goal in mind. I just don't think it feels like it should.