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#1 |
Registered User
Join Date: Feb 2003
Location: Santa Ana, CA
Posts: 2,191
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Auto to Manual Swap Questions
I'm getting ready to drop in a fresh 383 SBC that will make 450hp and 475 ft-lbs at the flywheel to replace the tired mill in my Blazer. I was thinking that I might just swap out my TH350 auto for an SM465 manual to better enjoy the new engine. My questions:
1) Will I have to move my transfer case crossmember? 2) Will I have to move my engine mounts? I don't have the donor tranny or adapter so I can measure them to see if they are the same total length as my TH350 tranny and adapter. Any knowledgeable experience is appreciated. Thanks. |
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#2 |
Senior Member
![]() Join Date: May 2011
Location: Greencastle PA
Posts: 6,716
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Re: Auto to Manual Swap Questions
I have went from manual to automatic and did not have to move anything bolted right up. Just so you know you do not have to pull the pedal assembly just pull the hollow pin for the brake pedal install manual brake pedal and the clutch pedal goes thru the hollow brake pin if that makes sense. It will save you from unbolting MC and maybe just lower the steering column to make things easier.
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#3 |
Senior Member
![]() Join Date: Jan 2013
Location: Monrovia CA
Posts: 453
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Re: Auto to Manual Swap Questions
Wireing issues no back up lights and neutral start
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#4 | |
Registered User
Join Date: Feb 2003
Location: Santa Ana, CA
Posts: 2,191
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Re: Auto to Manual Swap Questions
Quote:
Blazer690 - Good points. I think the back up lights get wired to the reverse switch on the SM465. The neutral safety switch will just be disabled, allowing me to crank starter in all gears, unless there is a better solution that you know of. |
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#5 | |
Registered User
Join Date: Oct 2009
Location: Great White North
Posts: 1,520
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Re: Auto to Manual Swap Questions
Quote:
#2: No The differences in driveline lengths between Auto and Manual are made up with the adapter between the Tranny and Transfer. This keeps all cross member locations and driveshaft lengths the same. BTW, your new motor sounds interesting. Did you purchase it or build it?
__________________
Jeff. '72 Blazer K5 "Camshaft opinions are like belly buttons; everyone has one and no two are alike" My Blazer Build: http://67-72chevytrucks.com/vboard/s...d.php?t=626752 My Engine Build: http://67-72chevytrucks.com/vboard/s...d.php?t=637336 |
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#6 |
Registered User
Join Date: Feb 2003
Location: Santa Ana, CA
Posts: 2,191
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Re: Auto to Manual Swap Questions
tjsblazer - Thanks for the additional info and confirmation. I am having the engine built. Torque curve will be flat enough to eat your lunch off of
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#7 |
Registered User
Join Date: Oct 2009
Location: Great White North
Posts: 1,520
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Re: Auto to Manual Swap Questions
Very interesting. I just finished a 383 build the past few months. Thread in my signature. Always curious about engine details for reference. Could you share or PM me them?
__________________
Jeff. '72 Blazer K5 "Camshaft opinions are like belly buttons; everyone has one and no two are alike" My Blazer Build: http://67-72chevytrucks.com/vboard/s...d.php?t=626752 My Engine Build: http://67-72chevytrucks.com/vboard/s...d.php?t=637336 |
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#8 |
Registered User
Join Date: Feb 2003
Location: Santa Ana, CA
Posts: 2,191
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Re: Auto to Manual Swap Questions
tjsblazer - The following are some of the build specs:
Bore/Stroke: 4.040 x 3.750 Scat Nodular steel crankshaft 4340 Scat I Beam rods KB forged pistons Moly rings Hydraulic roller cam; lift - .528 IN x .536 EX; duration @.50 - 220 IN x 224 EX Dart Aluminum Heads; 70 cc; valves - 2.02 IN x 1.60 EX Intake Runner Volume: 180 cc Compression ratio: 10.1:1 Rocker Arm ratio: 1.6:1 Edelbrock Performer Intake I will be reprogramming my current MSD Atomic fuel injection system, which also controls my timing through my MSD 6AL ignition box and locked out MSD dizzy. Fuel is supplied by in-tank pump with return system. All will flow through 2.5" mandrel bent stainless dual exhaust with cross-over. |
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