bigal's1991

so i am planning on putting a carbed 5.3 in my 91 305 TBI auto rs, with the msd control box from jegs, would any of my guages still work?? like the speedo?? if this sounds stupid im sry, im 19 and im trying to think of every last thing before i start the swap.. Does anyone know of any swap headers? (5.3/ls1) besides the hawks and fbody motorsports ones. thank you for your time

Pocket

iTrader: (24)

Using the stock 4L60 trans behind the 5.3, your buffer box will do all the work and the speedo will read just fine

Using a 4L60E you will need a separate control box from TCI or similar. Im not sure if they include a VSS decoder in their control module. You may need an extra bit for the signal, ask them directly

Any T56 sans LTx/LSx PCM will require a dakota digital converter box

BRP offer headers, noone has posted fitment results for them though so you may get a lame duck

Another option is modified SBC headers

Why carb over EFI? The 5.3 isnt hampered very much by stock 4th gen manifolds/stock LS1 intake and you cant beat the street manners of LSx EFI over carbs

1ADan

iTrader: (4)

also, your temp & oil pressure guages would be run from separate sensors/senders that are not part of the pcm harness, so you'll just need to find spots to thread those into the block and you're golden.

i too second the fi recommendation, especially since you can get most of the needed truck > car parts (intake, injectors, fuel rails) for less then it costs for the carb conversion parts.