Ok, I'm sure someone who has done a few of these knows what's going on...

I have a 95 S10 Blazer with the central "spider" injector system. One of the fuel lines inside the intake cracked, so I got the replacements and am putting them in fine, until...

I try to put the black plastic nozzles into the female ports on the spider assemply (this is the original btw), and the o-rings on the nozzles appear to be too big for the nozzles to go all the way into the port and seat properly. Therefore, the retaining bracket can't be put on. I tried fidgeting with it for about an hour trying to get it to seat all the way in, which didn't work, and I was reluctant to try to really force it in using pliers because obviously it could break or weaken it. I did use pliers to gently try to get a little extra grip on them, but not squeeze too hard, and push it the rest of the way in, but it didn't work. I tried putting some wd-40 on them to help ease them in. I also tried using a sharp awl to push in the o-ring as I was pushing in the nozzle and I appears to just kinda distend and not fit.

I tried putting on some other o-rings from a metric kit of different sizes I picked up from Autozone, but they were too thin. I tried using 2 at a time, which still allowed the nozzle to seat, but then when I pressurized the lines up, it was leaking a little.

Do I just need to shove the things in there, as is? Is it typical that they are so tight a fit? Otherwise guess I'm going to go all over trying to find a couple of automotive o-rings that will fit the dang thing.

The nut kit I'm using is the standard Dorman set (55163).