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#1
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Swapping a 301to a 400
Can anyone tell me what will swap from a 81 TA 301
to a 400 for ex: distributor, starter, fly wheel, motor mounts is the radiator big enough for a 400? Any help would be appreciated. Thank You. |
#2
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dist,front cover.Motor mounts are diff.Not sure about harmonic balancer and flywheel.Starter should.Oil pan should.Tom
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#3
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harmonic balancer will not. I don't believe the flywheel will either.
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#4
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As long as you have a 70 or later 5 bolt block your 301 mounts will bolt to it and will let the 400 set in place of the 301.
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1971 GTO,72 400, stock bottom end, 670 heads, Lunati BMII cam, headers, iron intake Q-jet, four speed. Best 60 ft 1.806in 2004. Best 1/8th mile e.t. 8.46 with 3.55 open rear 85 Grand Prix, 70 400, casting 62 heads stock rebuild, Turbo 350 trans 78 800 cfm Q-jet modified as per Cliff Ruggles book. 87 F350 6.9 4 speed dually A poor man has poor ways. |
#5
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What are you going to do with the 301?
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#6
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mite sell it is good running motor
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#7
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I think the flexplates are different
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#8
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I tend to agree as the 301 is balanced differently than the 400 and might have the smaller register at the rear of the crank. 350-455 flexplates (or flywheels) aren't all that difficult to find and replacements can be ordered through a local parts store.
__________________
1971 GTO,72 400, stock bottom end, 670 heads, Lunati BMII cam, headers, iron intake Q-jet, four speed. Best 60 ft 1.806in 2004. Best 1/8th mile e.t. 8.46 with 3.55 open rear 85 Grand Prix, 70 400, casting 62 heads stock rebuild, Turbo 350 trans 78 800 cfm Q-jet modified as per Cliff Ruggles book. 87 F350 6.9 4 speed dually A poor man has poor ways. |
#9
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I helped on this awhile back. The 301 is a shorter deck height, so you will need EVERYTHING!
The brackets will be too short or too low, the front cover will not fit as the bolts are in different spots, the pulleys will not line up as you will need a 400 balancer, the intake will not fit, the carb is a 2bbl? it might, but why? The rad MIGHT be enough as long as you are doing a MILD build. The auto trans will bolt up but you will need a 400 flexplate. If it is a 200 metric, baby it as it will not last. Exhaust.... The 301 manifolds WILL bolt up, but you will need to weld the 3rd hole on the drivers side for 3 and 5. Use Felpro header gaskets and you will be fine. You will need new manifold back though. Starter is the same. It will last as long as it starts easy. IF you have an aluminum water pump with the cast impeller, then save that. It will work great. Alternator will work, but you will need a new bracket. If I were you I would buy this bracket and put it on the passenger side. You'll spend a lot of money trying to find the right pulleys and brackets and eventually just buy this one. (Top of page) http://www.bopengineering.com/beltdr..._topend2.shtml Oil filter housing will work, but you might need an adapter so you dont have to remove the housing to change the filter. Power steering...... Good luck. The brackets are an issue. Plus you are going to have to find the right pump that will fit. Then find a pulley that can be shimmed. If I remember anything else I will post it. Don't be discouraged. The kid I helped, talked a good game and I found out he knew nothing. Did no research at all. So I found this stuff out the hard way. Get all of the pieces FIRST.. Hope this helps, Dave The
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1967 Pontiac Tempest 2dr HRDTP Coupe 468 C.I. 500 HP 5 speed = FUN!!! 1990 Chevy Suburban R2500 Daily Driver 1986 Volvo DL245 Wagon.. Project car!!! The Burb Files |
#10
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It sounded to me like he wants to pull the 301 and putin a 400?Tom
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#11
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Quote:
__________________
1967 Pontiac Tempest 2dr HRDTP Coupe 468 C.I. 500 HP 5 speed = FUN!!! 1990 Chevy Suburban R2500 Daily Driver 1986 Volvo DL245 Wagon.. Project car!!! The Burb Files |
#12
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Is it an Ac car? If it is the rad will work great.I have a 500hp plus 455 and have never had any cooling issues..use a stock clutch fan and you are good to go!My rad guy calls the rad a maxi 3 core.
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#13
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301s dont have a oil filter adapter!Tom
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#14
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The AC brackets will work as they bolt just to the head and the deck difference does not do anything. Now the Alt and PS barcketry are a different story as Dave said.
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
#15
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301
t hinks for the info this is what im builden 77 400 30 over xx block 6x 8 heads cut 35 t crain 454 lift 216 d johnson lifters ram air manfolds smi q jet stock intake 1.5 rockers carter m6907 fuel pump step over stock converter 350 turbo trans 342 gears the only thik im warred about is sealpower 8 valve pistons stock rods rebilt let me know if im headed in the righ t direction thanks
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