Although you didn't ID the year of the engine, I assume it's a LT1. If I had this issue, I have a couple of options:
Swap the tubes from the front to the rear; which may be difficult especially on the passenger side. 15 mm six point box end wrench or socket, OR
Remove the heads and swap them.
You can fabrictate something that'll serve the purpose but, for me, that would be a last resort measure.
Just my thoughts.
My son, Ryan M. Cameron, graduated from West Point on 22 May 2010! He was commissioned as a 2nd Lieutenant and I pinned on his first pair of "Butter Bars" PROUDEST DAY OF MY LIFE!!
1996 Vette, 388 CID LT1 (3.75" X 4.060"), Eagle Internally Balanced Forged Crank, Eagle 6" Forged Rods, SRP Forged Pistons, CompCams XFI 467 Cam (230/236 @ .050), Scorpion 1.7 RRs, AFRs ported to 212 ccs (304 cfm @.600), Match Ported LT1 Intake, SVO 30# Injectors, BBK 58mm