Mar 28, 2012 #1 S Sleeper Member Joined May 24, 2001 Messages 894 Trying to avoid some confusion I have a 4.1 block with Champion iron heads and am looking for the proper ARP head studs. I come up with: ARP-123-4201 ARP-123-4203 ARP-123-4001 ARP-223-4203 What is the right one to use? Thanks
Trying to avoid some confusion I have a 4.1 block with Champion iron heads and am looking for the proper ARP head studs. I come up with: ARP-123-4201 ARP-123-4203 ARP-123-4001 ARP-223-4203 What is the right one to use? Thanks
Mar 28, 2012 #2 T turbofabricator Well-Known Member Joined Mar 7, 2004 Messages 4,261 4001 or 4201 depending on which nuts you want to use. I.E. 12 pt. (4201) or hex nuts (4001) Just consider the block as a StageI '77-'85.
4001 or 4201 depending on which nuts you want to use. I.E. 12 pt. (4201) or hex nuts (4001) Just consider the block as a StageI '77-'85.
Mar 29, 2012 #3 S Sleeper Member Joined May 24, 2001 Messages 894 turbofabricator said: 4001 or 4201 depending on which nuts you want to use. I.E. 12 pt. (4201) or hex nuts (4001) Just consider the block as a StageI '77-'85. Click to expand... Thanks, appreciate it. Just curious about the 223-4203 ones. What is different about them?
turbofabricator said: 4001 or 4201 depending on which nuts you want to use. I.E. 12 pt. (4201) or hex nuts (4001) Just consider the block as a StageI '77-'85. Click to expand... Thanks, appreciate it. Just curious about the 223-4203 ones. What is different about them?
Apr 19, 2012 #4 S Sleeper Member Joined May 24, 2001 Messages 894 FWIW Stud lengths: 223-4204 (8) 3.750”, (4) 4.250”, (4) 5.000” 223-3705 (8) 3.060”, (4) 3.250”, (4) 4.300” 123-4003 (8) 3.750”, (4) 4.250”, (4) 4.750” 123-4201 (8) 3.300” ,(4) 3.600”, (4) 4.250”
FWIW Stud lengths: 223-4204 (8) 3.750”, (4) 4.250”, (4) 5.000” 223-3705 (8) 3.060”, (4) 3.250”, (4) 4.300” 123-4003 (8) 3.750”, (4) 4.250”, (4) 4.750” 123-4201 (8) 3.300” ,(4) 3.600”, (4) 4.250”
Apr 21, 2012 #5 T turbonut85 Rarely used member Joined Apr 11, 2008 Messages 3,345 ARP 123-4001 I just test fit this kit on my 14 bolt GN1 head and they will work fine for my 4.1L 291 block. HTH. ---Keith
ARP 123-4001 I just test fit this kit on my 14 bolt GN1 head and they will work fine for my 4.1L 291 block. HTH. ---Keith