S Sleeper Member Joined May 24, 2001 Mar 28, 2012 #1 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
T turbofabricator Well-Known Member Joined Mar 7, 2004 Mar 28, 2012 #2 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.
S Sleeper Member Joined May 24, 2001 Mar 29, 2012 #3 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?
S Sleeper Member Joined May 24, 2001 Apr 19, 2012 #4 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”
T turbonut85 Rarely used member Joined Apr 11, 2008 Apr 21, 2012 #5 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
