I Need Some Input On Engine Swap?!?

[JoeTahoe]

Hi guys. So I have my 98 2 door Tahoe and it runs like a top with 115k on the clock.

But a 1988 454 is available close by for a reasonable price. Im so tempted to get it but Its connected to a t400 trans and this has me concerned on a few different levels.

What do you guys think? Would it mount right up to my newer 4 speed auto and would all the electronics work right??

I know it will"mount" But want to be sure it will work right.

Any input would be helpfull.

Thanks.

 

[98sierra4x4]

Well I might be wrong but I don't think its a good idea to put a 454 behind a 4l60e, a 4l80e would probably be better. or even better a nv4500 5 speed.
And since you have a vortec and that old 454 is probably TBI the stock computer probably wont work.

 

[SCOTTYINWV]

Save the money for a 5.3

 

[SubWarrior]

Save the money for a 5.3

I agree. Or find a 6.0. It will take about the same amount of work and money to go with a newer motor, and you'll get a lot more bang for your buck in the long run.

Now im thinking about how fast a 2door with a 6.0 would be...

 

[5.3_silverado]

Go ls you will love it way more than the 454. I did mine about 5 months ago and it is amazing in the difference it makes. Better fuel mileage and the power is so easy and cheap to upgrade.

 

[Florab0i91]

Theirs so much room for activities.


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[thz71]

I agree. Or find a 6.0. It will take about the same amount of work and money to go with a newer motor, and you'll get a lot more bang for your buck in the long run.

Now im thinking about how fast a 2door with a 6.0 would be...

Not true an LS swap would be alot more work and money

 

[mpyusko]

A 4L80E shares many of the same internals as a TH400. A 4L60E is designed off the TH350. That being said, if you swapped in an older engine you would need to at minimum get a new computer for your tranny. You are looking at a huge project. If it were me, I'd swap both engine and trans together.

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[JoeTahoe]

Thanks for all the advice. But it runs so great Im going to leave it alone. At least till it needs touching.

 

[Mrich0908]

When the time comes .. or money Ill be dropping a 6.0 lq9 in my ride. 150 hp gain and my in town gas milage triples. Its a no brainer.
But anythings possible with money or the proper tools.