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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Feb 2002 Posts: 2 Junior Member | | Junior Member Joined: Feb 2002 Posts: 2 | i built a 409 NOT a 348!! this winter and i want to know will it fit. | | | | | Joined: Jul 2001 Posts: 20 Member | | Member Joined: Jul 2001 Posts: 20 | The 409 will certainly fit in your '71 model. You have more than enough room. You may run into other issues- with brackets, exhaust, etc., but nothing you can't work out. Good luck!
1954 Chevy 3100
454, T-400, GM 14-Bolt Disc brake
Monte Carlo Front Clip
| | | | | Joined: Feb 2001 Posts: 1,897 Member | | Member Joined: Feb 2001 Posts: 1,897 | Sounds like it will be time for the camera to take some pics for you to share with us! 
There is enough good in the worst of us and enough bad in the best of us that it does not behoove any of us to criticize the rest of us.
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Be yourself. If you are ever lost, It will be much easier to find yourself if you know who you are!
| | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | 409/348's most likely came in some of those trucks.
Ed
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
| | | | | Joined: Apr 2005 Posts: 2,832 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 2,832 | I had a 68 with a 396 and I think the 409's were in the earlier trucks. The 71 and 72 had 402 big blocks which were .030 over 396 blocks. I have wondered if a glitch in casting or boring led to these engines. The short story is all these trucks had a bb option so it should fit. The 409 truck block with the taller deck height is sought after by hot rodders.
Evan
| | | | | Joined: Jan 2016 Posts: 8 New Guy | | New Guy Joined: Jan 2016 Posts: 8 | Sounds interesting! As I recall, the 348-409 engines were last used in the 1962 production year, so anything 1963 or later should be the traditional small or big block Chevy.
I've always liked the 348-409 "W" head motors, as they aren't that common. It should make for a great conversation starter for sure!
-Joe | | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | The 348 went to '61, the 409 went to mid-'65 in Passenger. Both the 348 and 409 were used until '66 in HD trucks.
Bill Burmeister
| | | | | Joined: Jan 2016 Posts: 8 New Guy | | New Guy Joined: Jan 2016 Posts: 8 | Learned something new! Thank you.
-Joe | | | | | Joined: Feb 2014 Posts: 44 'Bolter | | 'Bolter Joined: Feb 2014 Posts: 44 | I put a 348 in my '48 p/u with no problems and yours should have more room | | |
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