Short vs long injectors

[Motorhome]

Hi,
I have got my hands on a set of rebuilt injectors for my old 6.2. My old ones are the long model but the "new" ones are short.
As far as i can see will the short ones fit my cylinder heads but I'd better get another set of lines from the IP to the injectors.
Have I missed something or will this work for me?
/Nils

[DmaxMaverick]

What year is your "old" 6.2? The short injectors will do fine to replace long injectors with the correct lines, but if your heads are too old, the injector threads won't be the same.

[Motorhome]

Threads are the same. I Think that the motor is a -87 or -88 but isn't sure. My motorhome had a 454 gasser from production but a previous owner swapped it for the 6.2 na.

6.7 metric tonnes to drag along, I have a dragster

[More Power]

GM used short injectors in vans because of the tighter clearances inside the engine cover. I' haven't seen a direct comparison of the steel fuel injector lines used for long/short injectors. I wonder what the difference is.... Jim

[Motorhome]

The difference is 0.4 inches (10 millimeters) so it is not a big difference. I'll try to bend the lines carefully. I'm afraid they are a Little brittle after 30 years.

Thanks for the response!!!

[DmaxMaverick]

The lines aren't much different, but they are, and using the long injector lines on short injectors will stress them, one way or another. You're right about being brittle. That's a lot of work hardening, pounded with ~1800 PSI pulses several times a second for near 30 years. Annealing may help, but I don't know what hardness standard they require to withstand more punishment. They are steal, and stout, so it's likely no big deal. If you do bend them into submission, I recommend large radii, as gentle as possible. The fittings should align onto the injectors and pump with no stress, and secured the same. Stressed lines, even much less old, will crack.