Hi guys, First off, I'm new to working on trucks entirely, so this is going to be an awesome adventure for me.. hopefully! You guys have already helped me fix my doors (the slamming sticky) and I've been reading a ton of good info here, so thanks! I picked up a 1982 Jimmy that's been modified a bit. This thing runs like hell, but it was love at first sight, so now it's in my driveway. http://i.imgur.com/9NRbl9g.jpg Engine: 454 with a TH350 (built for it), Edelbrock 1406 carb. I haven't ID'd the motor yet, cant find any numbers on it. Dana 60 axles, 4.10 ratio. 36" Tires, haven't measured the lift but the hood sits about level with my girls' Rav-4 roof. Bottom of the bumpers sits around 30" from the ground. The floor from the edge of the front seats to the very back is 1/4" diamond plate steel, the PO didn't think the OEM floor pans were thick enough. At any rate, I had to remove the glass packs since they are illegal here in MN, and I wanted to reduce the sizeable fine I'd get if I get nicked for other violations. So the Jimmy has stock mufflers on now. I'm not sure if the Jimmy did it before the muffler install, but I get a nasty stumble if I punch it off idle. With the choke on full, it's not as bad, but still there a little. I've tried adjusting the pump for a better squirt, didn't seem to make a difference either direction. I have not checked to see if I can see fuel squirting into the carb, can I do that with just the air cleaner removed? Below are some things I have bigger questions on, and pictures of!! Sorry that they are huge in size. Also you might have to turn your head on some of them.. stupid phone cameras. #1: I noticed this thing seemed a little loose, when I gave it a wiggle I found I can easily just pull it right out, with no resistance. Is this bad? http://i.imgur.com/BSsov2V.jpg #2: First, I'm thinking this is not a proper vacuum port cap/plug, it also shows some drying/cracking on the sides of it. Do you guys with a 1406 run on the manifold, or port vacuum connection? I read some things about guys swearing by the manifold vacuum hookup being the best option, but you might need to adjust timing. http://i.imgur.com/5hD6n4i.jpg #3: I was going to ask about where the linkage for adjusting the pump shot was, but discovered that right after taking this. Anyway, let me know if you see other problems to address here please! http://i.imgur.com/WgbyKLv.jpg #4: The PO liked yellow. A LOT. Anyways, can someone tell me some info about that distributor? I saw the HEI 65k ebay one people here seem to be a fan of. Would that be a smart upgrade? http://i.imgur.com/2Xn6i9p.jpg http://i.imgur.com/pw3mp2E.jpg http://i.imgur.com/s6HyEvE.jpg #5: I'm not so sure about this fuel filter. I can also see grains of sand or something in it. I believe I got a replacement for it from LMC. Anything to be careful about when I change it, or can I just pop it off and swap it out? Also, the fuel line currently runs right up the front of the motor and rests real close to the block and passenger side valve cover, not sure if that is a concern. http://i.imgur.com/8OXFHCu.jpg #6: I've cleaned small engine carbs about a million times. This looks kinda dirty to me. Should I rebuild? Is a 1406 (600cfm) worth rebuilding for a 454, versus picking up a 650/750? I was considering the Edelbrock thunder 1805, 650cfm. http://i.imgur.com/rjIRlOO.jpg http://i.imgur.com/mMg5PiU.jpg #7: I've tried a bunch of times to find a number on this motor to ID it. Can anyone tell me at least what model it likely is from this pic? Mark IV? http://i.imgur.com/FJZgTm1.jpg Okay, that's all my questions for tonight. Thanks to anyone who feels like responding!