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Username Post: 348 engine swap?        (Topic#347927)
Forum Newbie
Posts: 8

Loc: North Carolina
Reg: 04-26-12
10-29-17 07:25 AM - Post#2712532    

Hello all, Did some searching in the 60-66 truck forum for about 40 minutes with no luck. Got my hands on a '59 Impala a few years ago with a 348 in it. Was wondering how difficult it would be to transplant it into a 60-66 C 10. the earlier the model the better. It would look more correct that way. I am sure this has been done many times, just curious as to the details. Does it bolt right in? Move the motor mounts forward, left/right, recess firewall, exhaust/headers, steering column, oil pan clearance? Any info would be appreciated. Don't have truck yet but aggressively searching. Many prospects but won't pop until I gather this info. Just don't wanna get in over my head. Thanks Ecklers

"9th Year" Gold Supporting Member
Posts: 1838
Age: 68
Loc: south texas
Reg: 08-04-12
10-30-17 08:50 AM - Post#2712697    
    In response to Riddled

It should be a bolt in if the truck had a V-8 in it to start with. If it has a sic cylinder, not so much.
I put a 348 in a 57 two ton truck, longer ago than I care to admit. It was a riot to drive! I left the original six cylinder gears in the rear end, used the granny 4 speed. I had a blast. A lot of the local street racers got a big surprise.
All Chevrolet V-8s starting in 58 had the same block mount pads until the LS series came out. The big block water pumps sat higher in the engine bay, as the block was taller than a skinny block, but it would bolt to the mounts.
Good luck with the swap.

if you're gonna be a bear..................

if you're gonna be a bear..................

1960 Biscayne (the 6T)
2005 Yukon XL
2007 GMC Sierra Classic 8.1
2009 Silverado
2011 Escalade ESV

Honored Member
Posts: 27567
Loc: San Francisco, CA
Reg: 11-26-02
10-30-17 11:05 AM - Post#2712708    
    In response to Riddled

If you have a 63 or later truck, the 348 will bolt to your stock frame brackets. The fan shroud will need some cobbling, but that's about the only significant issue.

A 60-62 truck is more of a challenge because only the Powerglide equipped trucks used side mounts, and those trucks are scarce. On all others the normal V-8 front mount is a U-shaped piece which bolts to the holes on each side of the timing cover. This part does not fit a 348 without modification and is too scarce to bother with anyway unless you already have a stock 283 truck for a donor.

The 63-up truck side mount frame brackets don't fit 60-62 trucks because the frame is different on 63-up. Unless you want to use aftermarket brackets, your best shot is the frame brackets from a 58-64 V-8 passenger car. Fortunately, these are reproed because they are needed by builders who want to install a V-8 into 58-62 cars which originally came with a 235. This is what they look like: -64-CHEV...

Note that the brackets are specific for left and right sides and can not be swapped from one side to the other. Salvage yard or other used brackets of the correct type should also work at least as well as the repros, assuming you are able to find any. Just be sure you can verify what kind of car they came out of before you lay down your money. A lot of flaky used parts flippers are out there who have no clue about what they are selling and will tell you whatever they think you want to hear in order to make a sale.

I hope the above makes sense, but if anything needs more explaining, please feel free to ask and I will attempt to clear up any confusion.


Those who choose an automatic transmission want transportation. Those who choose a manual transmission want to drive.

Forum Newbie
Posts: 25

Reg: 05-27-15
11-04-17 06:45 PM - Post#2713287    
    In response to raycow

The engine must be moved ahead to clear the firewall, the left side head hits.I assisted my son on a 63C10.The v8 frame mounts can be relocated to the holes for 6 cylinder blocks. New crossmember relocated to support t350 trans. We used an electric cooling fan.New exhaust and typical other items. This motor is a lot wider and longer but it made a nice install. We used Edelbrock heads, camshaft and intake kit. Ecklers

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