454 in my 77 k-5

[Danny Joe]

Does anyone know how much trouble would it be to put a 454 into my 77 k-5 blazer. would it bolt right up to my automatic turbo 350 tranny. are the motor mounts the same. I just dont know. Any info would really help. Thanks, Danny Joe. My email is [email protected]

 

[SUBFAN]

It is a piece of cake....Keep on the lookout for a beefier trans and possibly a bigger radiater though....

The exhaust will probably need some reworking to hook up.

Nothing to major, drop it in and grin....

 

[Ryan B.]

It should work. I think you will use the BBC motor mounts.
I have a 454 for sale. PM me if your interested.

 

[Mad-Dog]

I just did one not too long ago and ya gotta move the frame mounts, no bigee the holes are already there.
pulled a 305 and stuck a 396 in the hole....

 

[shane74]

Does anyone know how much trouble would it be to put a 454 into my 77 k-5 blazer. would it bolt right up to my automatic turbo 350 tranny. are the motor mounts the same. I just dont know. Any info would really help. Thanks, Danny Joe. My email is [email protected]

Everything is a bolt in swap. You will want to consider running a 4 core radiator. If you do, do yourself a favor and use either the factory one with a new top plate, or spend the $$ on a thick aluminum one. The cheap aftermarket ones that drop into the stock location of the 3 core really don't work very well.

Since you are running a 350, the motor mounts are the same as well as the location of them. You won't have to move anything.

Also, keep an eye on your tranny. There are a lot of rigs that run the 454/TH350 combo, but most of the TH350's have been modified to handle the torque of a 454.

If your rig still has the 1/2 ton axles in it, go easy on the skinny pedal. Oterwise, you'll get to see the insides of your axles and you won't even have to pull the diff covers off.

 

[greg mgm]

I swapped the 350 from my 78 truck, and went with a 454. Whatever trouble you deal with, just do the swap!! You will love the big block power. Also, I needed a set of brackets for the accessories, maybe they'll come with your engine?? For sure, upgrade the radiator.

 

[Danny Joe]

Big for sale

Just wondering whats been done to it and how much? Thanks, Danny Joe.

 

[MEGALADON]

Very easy swap, don't have to move motor mounts bolts right in..

 

[Danny Joe]

Thanks, Any future plans for your rig.

 

[MEGALADON]

Thanks, Any future plans for your rig.

I got new wheels, my 454 is in, and I'm in the middle of a overdrive swap

Good luck with your swap

 

[JeffHK5]

What type headers? Do they fit good? By that I mean will the hit stuff under offroad conditions.

I know It's not been offroad yet but IYO?


O' sorry for the hi-jack, I just did the same swap and can't find a header thats worth a s@#%!

Thanks Jeff

 

[MEGALADON]

I have cheap $125.00 hooker headers, and they really suck, they hit the leaf springs
and they hit the driveshaft If you look at the last pic, you can see how the driveshaft has a ring from rubbing the header.

 

[JeffHK5]

They should let you put those pics. on the side of the header box so people don't waste there time!

And it's not just Hooker, Hedmen and Flow-Tech fit just as bad!

I think I'm going to try blockhugger headers from Summit as they are cheap and if they don't work I'm only out 129.99.

Might go for some stacks out the hood , like a pulling truck

If you find a set that works PLEAESE let me know.

Thanks Jeff