Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

Rebuild 350 or get the 454 Rat

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by scotty1, Jan 29, 2002.

  1. scotty1

    scotty1 1/2 ton status

    Joined:
    Jan 7, 2002
    Posts:
    166
    Likes Received:
    0
    Location:
    WV, Harpers Ferry
    I am looking at a 91 GMC Suburban with a 350 but the guy has a crate 454 ready to go with all the adapters. I am trying to figure if I should get the motor or look into the 350 rebuild possibly stroked into a 383. What do you guys think?

    Git there fastest with the mostest!
    Nathan Bedford Forest
     
  2. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

    Joined:
    Mar 5, 2001
    Posts:
    15,683
    Likes Received:
    1,392
    Location:
    642 Days to BB2018
    Scotty,

    Are there any "smog laws" in W.V.? My immediate concern would be doing an engine swap that "screws you over" with the DMV. In California, that's a huge consideration......though not on my "exempt '72!" [​IMG]

    Assuming that part's cool.....I'd say go with the 454. A 'Burban is heavy and could use the extra torque of a motor like that, and you'd have to "get on it" less....to actually keep it moving down the road.

    I know there's a thread about small-block vs. big block and fuel economy going on right now. It seems like the 350 will work harder to make the power (and burn more fuel) than the big block....so don't go with the 350 for a "fuel savings".

    I think that parts for the BB are more expensive....but it sounds like it's already built. So if the deal is right on that 454.....I know I'd be tempted to take it!!!!! [​IMG]



    -Greg72

    '72 K5 Blazer - 427BB/TH350/NP205/6" Lift/35x12.50's
    <font color=blue>See it here: </font color=blue><a target="_blank" href=http://coloradok5.com/gallery/albun38>http://coloradok5.com/gallery/albun38</a>
     
  3. scotty1

    scotty1 1/2 ton status

    Joined:
    Jan 7, 2002
    Posts:
    166
    Likes Received:
    0
    Location:
    WV, Harpers Ferry
    There are no smog laws, at the moment, in WV. I know the BB is heavier than the SB but makes way more power and torque The guy said it was a crate motor out of Texas, it is complete and ready to go with all adapters and the TB injection. The truck is a 3/4 ton and I am concerned that the BB will destroy the driveline, tranny and xfer case and ujoints, since it was original with the 350.

    Git there fastest with the mostest!
    Nathan Bedford Forest<P ID="edit"><FONT class="small">Edited by scotty1 on 01/29/02 04:27 PM.</FONT></P>
     
  4. Shawn

    Shawn 1/2 ton status Premium Member Author

    Joined:
    Feb 17, 2000
    Posts:
    1,753
    Likes Received:
    5
    Location:
    5280'
    If it's a stock GM crate with peanut port heads, I would pass on the 454. Stock figures for the newer 454's are usually only 230 hp and 385 lbs of torque. Don't get me wrong, I love BBC's but I think GM detuned them a little too much in the later years. I'd opted for an stronger BBC with your custom FI to match the cam/heads. If it's got an aftermarket TB/computer and decent heads, then I'd do it. Otherwise, it's hard to beat the price a well built SBC.


    Shawn
    87 K5
    few mods [​IMG]
    <a target="_blank" href=http://www.off-road.com/chevy>www.off-road.com/chevy</a>
     
  5. CaptCrunch

    CaptCrunch 1/2 ton status

    Joined:
    Feb 2, 2001
    Posts:
    3,596
    Likes Received:
    1
    Location:
    Minnesota
    Personally I would go for a 500 Caddy or a 455 Poncho motor. Unique and gobs more torque! Quite a few posts on these motors in last few months.

    -Mikey
    1987 Chevy K5 Blazer- 350 TBI
    <a target="_blank" href=http://coloradok5.com/gallery/captcrunch>http://coloradok5.com/gallery/captcrunch</a>
     

Share This Page