What GM cars came with big blocks?

[jp0863]

i have a friend building a camaro that wants a 454 from a car. i guess the heads are a little different on the cars than the truck. anyone know what had a big block? something that might be found at a wrecking yard.

 

[rjfguitar]

I'm guessing he wants rectangular port heads? Really, if it was me I would just get any block and use aftermarket heads. I am not real sure about a 454 in GM cars but there were lots of 396 options in the 60's SS models IIRC. There is always the LS6 454 but those are hard to find.

 

[thor]

70-74 chevelles, monte carlos, impalas, and vettes. The oval ports are the same castings between cars and pick ups of thet era, the peanut ports first showed up in 75 trucks.

 

[ssls6]

i have a friend building a camaro that wants a 454 from a car. i guess the heads are a little different on the cars than the truck. anyone know what had a big block? something that might be found at a wrecking yard.

Full and mid-sized cars (A bodies) from 66 to 75 or so. You'll need to learn how to recognize heads from the casting numbers or stamped engine codes.

 

[Lonnie P]

The 454 was first introduced in 1970. 74 or 75 was the last year in cars.
After that only trucks had them. They varied in HP greatly over the years.

Many of the High Perf versions bring good money to collectors. If planning to build one, it is a often a very good deal to get a crate motor in the long run.

'70 was the best performance (LS6 Chevelle 450hp), but the best running ones will not run on todays fuel. As they got newer, the performance dropped (and compression), but regular fuel was a possibility.

 

[pauly383]

Go pull a engine from a station wagon , one that has been heat cycled on and off many times from trips doing mommy's errands . Then buy aftermarket heads

 

[zx672]

My dad has an old school Cadillac Eldorado....I think 1972 or 76...can't remember. It has a 502 in it w/front wheel drive and it moves that big tub of steel just fine!

 

[JIMMY76]

Find An Old Caddy They Came With Bb

 

[WantedaDodge]

will a cad 500 bolt right in where a 350 was? I've always wanted a 500 cad motor in a truck. My blazer may just be a good excuse. The performance parts are spendy, but you don't hardly need anything other then an upgraded intake!

 

[mudjunkie 82]

Is this for the street?A good set of Merlin or other aftermarket heads is the way to go.Most of the aftermarket Brands you can buy bolt right on out of the box............................

 

[atho]

will a cad 500 bolt right in where a 350 was? I've always wanted a 500 cad motor in a truck. My blazer may just be a good excuse. The performance parts are spendy, but you don't hardly need anything other then an upgraded intake!

you need an adapter, or a BOP transmission.

 

[supersize75k5]

I have a factory bore ls6 454, factory heads, everything, pm me for details if you friend is interested.

 

[pauly383]

You have a LS6 motor ? As in 1970 Chevelle ?

 

[supersize75k5]

yup, sitting, it may be for the build for the 496, if I ever buy the kit to do it,

I thought we already talked about this last month? I think yours or my memory is fading

 

[84_Chevy_K10]

I'm guessing he wants rectangular port heads?

Why would anybody want rectangular port heads to drive on the street?