78QuickSilverTruck

Alrighty guys. my goals in the first place were to put a 406 small block in, but funds cut my dry. so i talked to my fellow truck owners on another site... they persuaded me my money would be well spent on an ls1 swap so here i am. BEST 250 dollars spent. after that, my friend/brother inlaw wanted to do a L98 swap into his 77 nova. After he figured out the trans in the van was a 4L80E he offered it to me. which works out cause, i found out that the TH350 i had was 30 inchs long, with a 9 inch tail shaft. 4l80e is 31 inchs... so i got the special flywheel and everything for the 4l80e and bolted it up to the engine since you need the spacer and the 6 bolt patern to bolt up the converter. so i pulled my yoke out, found out it was a 1350 yoke vs my 1310 driveshaft. i took care of this with a moog/strange u joint... i hope im not boring you guys... Now to the part where i put the engine and trans in.. nice and tight like a glove. had to do a few mods before having to set the engine in right, like motor mounts and some frame mods.


I have bought me a camaro wiring harness, and i looked through all the info on here and found out that RED and BLUE delphi computers came out of camaros. i have the serv No. 12200411. HDW No.09386530 *86DFNN9102236G87* and it was said to come out of a 01 silverado with a 6.0 and a 4l80e.. so im curious. did i get false advertisement? whats this for really???

78QuickSilverTruck

Forgot to mention the place where it connects to the ECM is Red and blue. ive seen everyone say that the ECMs that label in INK read red and blue instead of blue and green, are usually F body ECMs.. am i correct? or did these guys pull this ecm outta an 01 truck, and thought it was stock? i only payed 50 bucks im not worryed cause ik i can reprogram it. Dont wanna have to though!
The numbers are as stated in above post
Thank you guys for any info in advance

gagliano7

My 1999 gmc pcm has the red blue connectors.Check out this thread https://ls1tech.com/forums/pcm-diagn...-question.html

1fastpickup

FYI - the build link in your sig takes you to a for sale add for a grill (that's sold)...

78QuickSilverTruck

Thank you for pointing it out... Ill fix it right away. i dont get it... i had it copied and pasted

78QuickSilverTruck

Ill check that out, thanks man!

78QuickSilverTruck

Ok now i understand.. Thank you guys a million.

78QuickSilverTruck

so ive gathered that this is also build threads, so im gonna show off some of my progress. i didnt get pictures of the engine mounts...
Right now ive caught a snag on the trans crossmember and would like to swap a new crossmember in.. the 4L80Es mounting position is pushed further back. gonna look through summit for a good deal on a crossmember to fix this, but if anyone has any suggestions to a straight bolt in tubular design let me know please..
Thank you

84hernandezc10

looks good in there