View Full Version : Looking for info

11-09-2016, 07:32 PM
I just picked up a1994 blazer with 5.7 the info i am looking for is i was told i can take a big block throttle body and plug and play it to my 5.7
But when i do reading online it says i have to get a chip and a fuel regulator and injectors
Has any of you done this whats your thought the reason i was thinking about doing it was told it gives more power when towing trailer

11-09-2016, 09:44 PM
Supposedly the 4.3 and 5.7 have the same harness,

11-10-2016, 12:10 AM
The fuel reg and injectors are part of the throttle body
The big block one has bigger injectors and bigger throttle bores
And you would have to get it programmed
I'm not so shure the gains for cost would be worth it
You could swap the injectors from 5.7 to the big block throttle body
Then the fuel rate stays the same and slightly more air flow
But you would probably get the same gains by a better flowing air filter