Hey guys

I called the local shops and I found an LT1 motor with harness and computer for $850. I had to drive for 2 hours to find the town where it was at. The motor has been out of the car for about 4 months and it looked pretty dirty. I also had corrotion on the back of it. The guy said it had 75k miles on it and he guarantees it.

This is the casting number i pulled from the ledge of the block 10125327

I also got a speeding ticket 74 on a 55 and the seatbelt does anyone know how much are the fines?

 

What did it come out of?

You're also going to need a transmission (and bell housing if manual).

 

he said a 95 trans am. i got a 700r4 tranny

 

If true, that's better than the Caprice/Impala engines, and '95 was better than the earlier, I've heard.

I assume you're reading up on the stickies at the top of the forum. Both the LT1 and V6 -> V8 swap, because they both apply to you.

 

i forgot to update my profile. i sold my v6 i got an 85 TA with a 305

Did you check the casting number?

 

They used the same block casting from '92-up. That doesn't help any, and it doesn't tell you body type it came out of.

 

Yep, 95 is considered the best year for a swap because it has the improved opti design, hardened push rods, sequential injector fire (unlike the batch fire that was existent in 93) and is OBDI. I saw go for it if they can give you some sort of warranty.

 

For my benefit: Aluminum vs. iron head differences?

 

i think aluminum ones are better

 

Aluminum = lighter weight, dissipates heat more quickly, not as much flow.

Iron = Heavier, flows better, retains heat.

Its a Ying Yang thing.

 

Yup. The aluminum ones are prefered because the weight savings far surpasses the little flow difference between the two. Either of the two become monsters when ported.

 

I was trying to establish which vehicles received which heads.

Aluminum in Vette only, or Vette & F-body?

Cast iron in Caprice/Impala only?

Or....?

 

i think vette and f-body get aluminum

 

Aluminum in all vette and F-body
Iron in all B-body cars (impy's, caprice, roadmaster cars etc)

 

Not sure if there is any truth to this, but I have heard of people on camaroz28 having iron heads on thier 93 f-bodies from the factory.

 

moreyes,

Reason I was asking is, if this engine has iron heads, you've got reason to doubt what you're being told.

Not unheard of for a "Vette engine" to have actually come from a truck, you know...

 

Would the ECM part number help in identification?

 

They didn't look rusted or corroded when i looked at them. Iron ones would have some corrotion or at least a different tone don't you think.

I also looked the casting number and I got this

10125327...350...92-up...2 or 4...Gen.II LT-1, reverse flow cooling

The Caprice and Impala have a different casting number. 10168588...265...94-96...2...L99, Gen.II, 4.3 Liter V-8, Caprice, reverse flow cooling
My guess is that they are aluminum since he says they came out of a trans am.

 

magnet will let you tell instantly, and also those head casting numbers you pulled are for the L99 not LT1 for B-body's also a good thing to check, don't wanna be suckered into a baby LT1.

10125320...94-96...350..........Gen.II LT1, cast iron version, used
on "9C1" Police package, Impala SS,
Cadillac Fleetwood, Buick Roadmaster
reverse flow cooling

12554290...94-96...350..........Gen.II, LT1, cast iron version, used
on "9C1" Police package, Impala SS,
Cadillac Fleetwood, Buick Roadmaster
reverse flow cooling

 

10125327 this what i got off the ledge on the block

 

The Caprice, Impala, Roadmaster, Vette, Camaro, and Firebird all used the same 5.7l block.

The "baby LT1" was only used in the B-bodies.

The block casting # won't tell you whether cast iron or aluminum heads. I wouldn't trust the lack of corrosion to make the leap that they're aluminum (I'm not sure if the factory painted them, for one thing).

 

so theres no way to tell?

 

Put a magnet up to the head itself. It it is attracted, it's cast iron. If it isn't attracted, it's aluminum.

Or,

Pull a valve cover and check the casting number of the head (the block has a casting number, the heads each have a casting number, the intake has a casting number, etc., etc., etc.).

 

the way to tell is far simpler, iron heads are painted, aluminum ones are not.