351m/400 Small Block Or Big ?

83GTMUSTANG · 10-04-2005, 09:53 AM

My Friend Has An 351m/400 With C6 Trans In An Lx Mustang And Hes Giving It To Me For The Work Im Doing On His Gt An I Was Wondering Will It Bolt To My T-5 Or Is There An Adapter Plate For That.......

~The Jester~ · 10-04-2005, 10:18 AM

Neither. The 351M and 400 engines are nominally Cleveland-style small-blocks with higher decks. But the “Ms” also have a 429/460 rear block-face bolt pattern and unique engine mounts not shared by other Ford engine families. All small-blocks are externally balanced, so be sure to use the correct harmonic balancer and flexplate/flywheel for the application in question: Pre-’81 302 (and smaller) engines and all 351 engines require a flywheel or flexplate with 28.2-ounce unbalance; ’81-and-up 302 engines require a flywheel or flexplate with 50.0-ounce unbalance.

83GTMUSTANG · 10-04-2005, 11:31 AM

Does It Need A Shorter Drive Shaft With The C6 And Can I Connect A T5 To It In Any Way......

10-04-2005, 09:53 AM	#1
83GTMUSTANG N-V-ME Join Date: May 2005 Location: SOUTHFIELD,MICHIGAN Posts: 155	351m/400 Small Block Or Big ? My Friend Has An 351m/400 With C6 Trans In An Lx Mustang And Hes Giving It To Me For The Work Im Doing On His Gt An I Was Wondering Will It Bolt To My T-5 Or Is There An Adapter Plate For That....... __________________ 88' LX MUSTANG: LINCOLN ROTORS , AIR SUSPENSION FRONT AND REAR, SUBFRAMES, ROLL CAGE, 92' BLOCK, MSD 6AL, ACCEL 8.8 WIRES, ACCEL COIL, EDELBROCK F4B INTAKE (PORTED),2 IN. 4 HOLE SPACERS, HOLLEY 600 CARB.,HOLLEY BLUE FUEL PUMP AN REGULATOR, E 303 (.498 IN. 220 DUR.) CAM, (.535 IN. OF LIFT W/ 1.72 SCORPIN ROLLER ROCKERS), PORTED E7'S, FLOWTECH 1 5/8 LONG TUBE HEADERS, 2 1/2 IN. H PIPE, 2 CHAMBER FLOWMASTERS WITH 3 IN.DUMPS, T-5, 3.73 GEARS, 5 LUG AEROSTAR AXELS, 245-45-17 96' COBRA WHEELS

10-04-2005, 10:18 AM	#2
~The Jester~ Rat Killer Join Date: Aug 2002 Location: Cold ass Ohio Posts: 1,143	Re: 351m/400 Small Block Or Big ? Neither. The 351M and 400 engines are nominally Cleveland-style small-blocks with higher decks. But the “Ms” also have a 429/460 rear block-face bolt pattern and unique engine mounts not shared by other Ford engine families. All small-blocks are externally balanced, so be sure to use the correct harmonic balancer and flexplate/flywheel for the application in question: Pre-’81 302 (and smaller) engines and all 351 engines require a flywheel or flexplate with 28.2-ounce unbalance; ’81-and-up 302 engines require a flywheel or flexplate with 50.0-ounce unbalance. __________________ d-Con Racing "Nothing fancy, just 347 inches of RAT POISON!" MICE need not apply.....

10-04-2005, 11:31 AM	#3
83GTMUSTANG N-V-ME Join Date: May 2005 Location: SOUTHFIELD,MICHIGAN Posts: 155	Re: 351m/400 Small Block Or Big ? Does It Need A Shorter Drive Shaft With The C6 And Can I Connect A T5 To It In Any Way...... __________________ 88' LX MUSTANG: LINCOLN ROTORS , AIR SUSPENSION FRONT AND REAR, SUBFRAMES, ROLL CAGE, 92' BLOCK, MSD 6AL, ACCEL 8.8 WIRES, ACCEL COIL, EDELBROCK F4B INTAKE (PORTED),2 IN. 4 HOLE SPACERS, HOLLEY 600 CARB.,HOLLEY BLUE FUEL PUMP AN REGULATOR, E 303 (.498 IN. 220 DUR.) CAM, (.535 IN. OF LIFT W/ 1.72 SCORPIN ROLLER ROCKERS), PORTED E7'S, FLOWTECH 1 5/8 LONG TUBE HEADERS, 2 1/2 IN. H PIPE, 2 CHAMBER FLOWMASTERS WITH 3 IN.DUMPS, T-5, 3.73 GEARS, 5 LUG AEROSTAR AXELS, 245-45-17 96' COBRA WHEELS

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