My 1998 Chevy Cheyenne 4x4 4.3 liter V6 engine blew and I would like to know how hard it would be to put a 305 engine in it (I.e. will the 305 mount to the stock transmission, what other factors might I run into)?

5

Asked by Sep 28, 2012 at 02:44 AM about the 1998 Chevrolet C/K 1500 Cheyenne Extended Cab SB

Question type: Maintenance & Repair

6 Answers

3,235

there are a few things to consider , you'll need a larger radiator , engine wire harness for a v8 , computer, tranny, driveshaft ,exhaust manifolds,motor mounts, it would be cheaper to just buy one.

1 of 1 people found this helpful.
19,505

Ok, first off the 4.3 shares the same bellhousing as any small block chevy so the only conversion factors are the motor mounts need moved and the v8 harness. The trans you have assuming its automatic is an electronically controled 4l60e. The v8's share it. It needs the computer to work. A vortec 305 or 350 with harness and PCM will work best. Snag the radiator out of a truck with the v8. Be sure to get a 4x4 oil pan for your swap, there is a differance as the 2wd pan will contact the front diff. I dont sugest going carburated becasue of the trans needing a computer and a carb'ed 305 isn't really an upgrade over a vortec 4.3. Unless it's built out.

1 of 1 people found this helpful.
19,505

Just an afterthought, a 5.3 from the newer trucks will give you the best bang for our buck with just about the same difficulty. They even use the same tranny, would suggest a driveshaft upgrade.

1 of 1 people found this helpful.
5

Thanks for the quick replies. However, after speaking to a local mechanic who told me unless I have 6 months to wire in the new computer it definitely isn't worth the trouble. So, I'm just going to replace the 4.3 liter engine and get another transmission for it later down the line. Again, thank you for your input and time.

5

Sorry, also forgot to include the transmission is a 5 speed manual.

19,505

The 5 speed will handle a v8 and actually makes it easier. You mechanic is a pansy. Lol.

Your Answer

C/K 1500

Looking for a Used C/K 1500 in your area?

CarGurus has 858 nationwide C/K 1500 listings starting at $2,000.

ZIP:

Chevrolet C/K 1500 Experts

  • #1
    Andrew Olsen
    Reputation
    3,700
  • #2
    John Saffrahn
    Reputation
    2,600
  • #3
    Rowefast
    Reputation
    2,190
View All

Related Models For Sale

Used Chevrolet Silverado 1500
2,231 Great Deals out of 167,963 listings starting at $1,000
Used GMC Sierra 1500
1,004 Great Deals out of 66,526 listings starting at $2,495
Used Ford F-150
2,512 Great Deals out of 193,861 listings starting at $799
Used Chevrolet C/K 2500
209 listings starting at $6,495
Used Dodge Ram 1500
371 Great Deals out of 10,765 listings starting at $1,500
Used Chevrolet Tahoe
703 Great Deals out of 41,339 listings starting at $1,995
Used Chevrolet Camaro
407 Great Deals out of 30,592 listings starting at $2,495
Used Chevrolet C/K 3500
221 listings starting at $3,999
Used Chevrolet S-10
15 Great Deals out of 1,255 listings starting at $1,600
Used Toyota Tacoma
586 Great Deals out of 43,856 listings starting at $2,200

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.