Well after screwing with the intake this weekend. There were some things and info on the internet that were sort of vague so I will try to help some of you guys here. The LS1 intake bolts right up. But the steam tubes are in the way. You can get the ones from the camaros which bypass the intake for clearence. I ended up using the camaro one on the rear which has a t then cutting up the existing ones and flaring them and using small coolant lines to crossover them. They say you can be ok with just running the front ports, then block off the back. But I figured running the 4 like stock would be better. Apparently, the steam tubes are there to prevent hot spots in the head and equalize pressure.
The next problem was with the injecters and rail. They fit in no probelm but they won't bolt up to the intake manifold to hold them down. You would need the stock camaro or corvette etc rails and injectors which usually aren't all that cheap. Their are some guys that just make a bracket adapter which is when I plan to do. Not super clean like stock, but hardly noticable. If you use the camaro stuff, you will need to switch out the injector plugs, I understand they are about 40-50 bucks total. The only other probelm I could figure is the camaro rails are returnless also so I'm not sure if the computer needs to be reprogrammed for ls1 rails instead of my lq4 rails. Another reason the I'm sticking with the stock stuff. The only downside to this is the crossover tube between the rails still sticks up like an eyesore. I have the clearence I needed, but It could be a good 4 inches lower I f I could figure that out. All the LS1 rails are built in not removable like the truck series. I have looked all over for adapter and couplers, or even bending the one I got. But I don't want to ruin a working deal, at least not yet
So like i said I mounted mine backwards and the only clearence issues is the oil pressure sending unit. I don't think I'm going to use the big bulky unit anyways. I tried everywhere online to find a m16-1.5- 45 degree fitting with no luck not even summit racing. This is all you would need to make the stock one work, or even a 90 degree. I think the stock one is a light anyways since its a one 1 wire unit.
Plus my modded harness does not have a oil pressure plug anyways. They do make a npt converted fitting to m16 1.5 thoug for a backup.
