C30 454 Headers Install Question

[lgvl]

Hello everyone, long time reader first time poster. I bought my 82 C30 3+3 dually late last year and have been in the process of fixing some of it's problems, it had sat in a barn for at least 5 years, and now it's time to replace the old exhaust for a new one. My plan has been to do what many others seem to have done which is install the headers myself and have an exhaust shop in town finish the welding, mandrel bending, and install. The question i have is that after reading the installation procedure for a few of the headers over at summit racing i need to jack the truck up 36" to install them from the bottom. This isn't really an option as i have no means of getting the truck that high. SO, is it possible to install the headers either from the engine bay OR to shimmy them in from below with only a slight jackup height? Thanks guys!