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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: Nov 2008 Posts: 64 Wrench Fetcher | | Wrench Fetcher Joined: Nov 2008 Posts: 64 | I have a 1963 chevy 1/2 ton with the factory 3 speed trani in it.My question is can I put a turbo 350 in it with the low hump floor pan or will I need the high hump pan for clearance?
Thanks Longhorn | | | | | Joined: Mar 2005 Posts: 1,636 'Bolter | | 'Bolter Joined: Mar 2005 Posts: 1,636 | It should fit. But others that know better will chime in soon. But it should go right where the 3 speed went.
May have to move (or make) a rear transmission mount and cross member though.
Depends on if your three speeds bell housing sits on cross member, or if the rear of the three speed sits on a cross member.
Been too long since I looked at a 63. | | | | | Joined: Nov 2004 Posts: 1,552 Shop Shark | | Shop Shark Joined: Nov 2004 Posts: 1,552 | The T350, T400 & Powerglide, will clear the low transmission hump. You will need to remove the manual transmission cross member and install an automatic transmission crossmember, in the correct tailshaft mounting location.
| | | | | Joined: Apr 2005 Posts: 2,098 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 2,098 | You will also need to shorten the driveshaft, change the front yoke to the fine spline that auto transmissions use, install an oil cooler & lines, transmission kick down cable/bracket, and either modify the column shifter or use some aftermarket shifter.
Fred
1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine
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