What all needs to be changed when putting a 350 in, rather than the stock 305?


Asked by Oct 20, 2015 at 09:54 AM about the 1997 Chevrolet C/K 1500 Silverado Extended Cab SB

Question type: Maintenance & Repair

My buddy has a 1997 Chevy Cheyenne that he blew the motor on, i
understand its a 305, and if i did the swap i would want to put in a 350, but i
dont know what to get, is it a Throttle Body Injected intake? Ive heard that it
is EFI but i dont fully understand what the difference is if there is any. Being
a 97, it would still need to pass emissions, so the computer system would
have to sync up, if its not needed i would prefer not to have to replace the
computer so if i go with a 350 could i use the 305 computer? Thanks in

1 Answer

Andrew Olsen

You need a 96 and up year model engine. The earlier ones are the old tbi engines and the one you have is called a vortec. Google the engines and you can visually tell the difference pretty quick. If you run a 350 you need to run the computer for it. It's very easy to swap the computer, if I remember it mounts under the hood anyway. Just get it from whatever you grab the motor from. Make sure it's the same trans as yours, (automatic or manual).

Your Answer

Add photo

Related Questions

Search Chevrolet C/K 1500 Questions

Chevrolet C/K 1500 Experts

#1 Andrew Olsen
Andrew Olsen
Reputation 2,570
#2 John Saffrahn
John Saffrahn
Reputation 2,260
#3 Rowefast
Reputation 1,190
View All

Related Models For Sale

Used GMC Sierra 1500"
1,050 Great Deals out of 56,530 listings starting at $2,300
Used Ford F-150"
3,256 Great Deals out of 217,218 listings starting at $1,000
Used Chevrolet C/K 2500"
288 listings starting at $1,995
Used Dodge Ram 1500"
528 Great Deals out of 13,942 listings starting at $995
Used Toyota Tacoma"
655 Great Deals out of 30,629 listings starting at $2,850
Used Chevrolet Tahoe"
1,146 Great Deals out of 36,619 listings starting at $1,995
Used Chevrolet S-10"
9 Great Deals out of 1,809 listings starting at $1,749
Used Chevrolet C/K 3500"
309 listings starting at $5,600
Used Chevrolet Camaro"
826 Great Deals out of 39,076 listings starting at $2,650