Pencil Style Injectors
DO NOT WORK OUT OF THE BOX, as they do not hold down the large rubber intake manifold gromets. You will need to create a plate to hold them in place.
Even then, you're now relying on the injector body itself as the seal with the rubber o ring. Sure it works, but it's not for the 'everyday' user. If I had to do it again, I'd just use the 72lbers and be done.
To create the plate, you will certainly need to make it removable. Simply 'welding' them shut with a plate will melt/ruin them.