THE LAST Z

iTrader: (5)

I have a LQ9 370 that I bought used. I need ARP head studs, but theyre asking me if its before or after 2004 block. How do I tell?

01ssreda4

iTrader: (96)

Need to find out if the outer middle row bolt holes are shorter then the rest or are they all the same size.

THE LAST Z

iTrader: (5)

Cool thanks... so wich one is wich?

raven154

iTrader: (14)

Early blocks had short bolts, later blocks had all the same length.

NC98Z

iTrader: (1)

That sounds backwards to me. My 98 block had all equal length head bolts. The TSP SB I bought was built off a 2004 GTO block and had different lenth head bolts and were cheaper.

smask04C5

iTrader: (1)

2004 and later blocks used same length studs or bolts

raven154

iTrader: (14)

My 2004 LS6 had all the same length bolts. The 2003 LS6 block I bought to replace my broken 2004 LS6 block used the long and short.

01ssreda4

iTrader: (96)

Later models use all short bolts, early 04 and down use 2 short bolts on the outers in the middle row, the rest of the big bolts are really long, about 6 inches. My 04 LS6 used the early style.

THE LAST Z

iTrader: (5)

OK I just measured them. The holes are all 2 3/4" deep. So I have 04' + up. Does this sound right?

89 formula350

iTrader: (8)

most of the blocks well all ive seen so far had date castings in them and were spot on for the year they were from

bww3588

iTrader: (49)

didnt happen. sorry...a 98 block will have 2 long and the rest short

AES Racing

iTrader: (6)

Sounds like you have 2004+ block

5.3LJimmy

iTrader: (10)

Actually a 98 block will have eight long, two short, and 5 really short(per side). Sorry :

bww3588

iTrader: (49)

-OK smart ***...sorry

txh0tb0i972

iTrader: (63)

Just do what i did ....... get a long straw or some type of pencil or a screw driver

editdo it without the head on though ....ive posted a 2nd pic of the holes without the head


Now you see the pic....insert the pen/straw or whatever your using into hole number 10 and 3 if they are both the same size then its going to be the 04 and up .... if 10 is shorter then 3 then its pre 04