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I like magnaflows

They are ebay headers for 98-02 fbody yes I had to notch the frame on the passenger side. drivers side i had to cut the collector pipe and turn it to aim straight towards the rear and a small...

here are some final shots of the motor with the headers. Also added a brake booster and had my inner fenders powder coated jet black...

Good luck sounds like a strong combination. Headers or manifolds?

Finally got it running had the passenger side coil pack harness backwards runs pretty good but still have some running to do.

well finally got my headers on but they were a pain! I knew the drivers side needed to be cut and rewelded no big deal. what I didnt know is I had to modify the shifter linkage that wasn't even that...

Thanks ..... What does the drivers side collector interfere with? I have to run all new exhaust was wondering if I could just modify the exhaust

Finally put my 5.3 in this week trying to figure out the alt. wiring and I should be good until my headers come in monday. I will try to take some detailed pictures of what modifications that are...

Thanks for all the research... I will buy these next week s & p told me 587 plus shipping so i will have enough to finish exhaust.

http://www.ls1truck.com/forums/attachment.php?attachmentid=4153

I am also doing this swap and need headers bad 5.3 th350 with mounting plates in stock location. waiting on s&p to call me back to see what they have