ion05

It came with 4L60E transmission

#706 was on the bottom block

N20zuki

Looks like 4.8/5.3

ion05

LQ4? http://www.ebay.com/itm/6-0-LITER-VORTEC-LQ4-DROPOUT-ENGINE-MOTOR-CHEVY-SILVERADO-84K-COMPLETE-DROP-OUT-/150837372910?pt=Motors_Car_Truck_Parts_Accessories&hash=item231e9ba7ee&vxp=mtr

2000PewterT/A

What is the head casting number, and the block casting number, head casting number is located on the bottom right side of each head under the valve cover. Block casting number is located on the backside of the block under the driver side cylinder head.

ion05

12569519 dont quote me on that ill check tomorow when the sun is out

ion05

Head casting # 21995J2710865

Block Casting # 601806850776

ion05

Bump....bump

97camaroguy

iTrader: (5)

If the casting number 706 is on the corner of the head then that means that the motor is most likely a 5.3l

Remnant-of-VII

Going by the head casting, it's an early 4.8l/5.3l for sure. Dished pistons are 5.3l. Flat tops are 4.8l.

ion05

706 is on the corner of the head so its a 5.3 LQ4 that I have?

N20zuki

Its drive by wire though, So I am not sure how early it is.

No it looks like you have a 5.3 LM7

pdsq98gt

It has the old style of intake cover so its either 99-00. Look at the right rear corner of the block and it will have either 6.0 or 4.8/5.3 cast into it. Some SUVs were equipped with DBW before 03 but had that vette style of throttle body.
And if it was a 6.0 in 99-00, it would have iron heads. It's either a 4.8/5.3. Pull a spark plug and see if it has dished or flat tops. Dished= 5.3. Flat=4.8

ion05

Would it be good to swap this in a foxbody? or better off looking for a ls1 or another vortec engine?

ion05

their dished heads