as stated earlier, i've done 2 lt1 swaps into g-bodies. both are running and driving. my gmc caballero i've been driving for two summers. will drive it anywhere. 3-4 hour trips one way with no problems. the G wagon i completed last fall and have over a 1000 miles on it. my son has it down at school, two hours away. so if anything goes wrong, i'll be road tripping to help fix it. i'll start by answering your questions and then add some tips from there.So, if you've done a successful LT1 swap in you're G-Body, I have a few questions.
wiring, lots of wiring. i have the 95 and 96 gm service manuals for guidance. i started with a complete engine, dash and body harness (all the way back to the tail lights) wiring harness and start stripping out what i don't want or need. i like having the factory harness to pick from, i get to chose what features i get to keep and i don't have to buy any extra wiring. i kept the pcm out in the left front corner under the factory air cleaner box. i utilized any much of the original engine bay wiring as possible. anything extra that needs to go inside the car, goes thru the old cruise control hole in the firewall.First, what was the biggest issue during the swap? Was there something you may have done differently?
the a/c compressor will fit without any mods to the frame. but, there is no clearance to when the engine moves under throttle torque and not enough room to get the drive belt on or off. i massaged the area on the right frame rail just behind the idler arm mount with a little heat from a yellow map gas torch and a 10lb sledge. i used the sledge more for the size than for the weight. it need to be massaged about 1/8" to 1/4". with this done, the compressor won't touch the frame and it provides room for the factory b-body p/s lines to be used. here are some pics. fyi, compressor will need to be attached to the accessory drive bracket before mounting of accessory bracket to engine. now with all that said, i have not finished the a/c install. but plan to this summer. b-body compressor lines will be used. just need to make it all fit.Did you keep the AC? Was there issues with that?
i have not done this on a coupe or sedan yet. i was able to use the factory nylon fuel lines. mount the fuel filter on the left frame rail like the b-bodies do it and be sure to cover the fuel line with plastic convolute like the factory does to prevent chaffing. on my G wagon i used a fuel pump and sender from an astro van inside the factory wagon tank. on the caballero i used a fuel tank from a 91-96 b-body wagon. for a coupe or sedan, i would try a tank from a fuel inj monte. use the f.i. sender with an upgraded fuel pump. i would modify the hard lines on the sender to match the nylon fuel hose snap fit connections. i would strip the fuel pump wiring from the factory b-body harness to be used for this.How did you do the fuel system?
patience. keep asking questions. i'll help as much as i can. and i know others here on the forum will to.And finally, is there something important I should know/ do before I dive into the swap myself?