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Author
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Topic: 351 swap?
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just_another_ 91
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Member # 9317
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I am debating on putting a 351w in my 89 coupe and was curious what all I need and what all do I have to modify to make it fit?
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R.I.P 91 Black LX: 13.45@102.62
Posts: 206 | From: CA | Registered: Jul 2009
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Duncan Motors
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Member # 7045
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pan , 28 balance stuff, 351 lower intake and dis, ive done 5 now.
Posts: 6310 | From: Vallejo | Registered: Sep 2006
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90 7up lx
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Member # 10304
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Duncan, with 5 now....how do you compare the 351 to the 302...i know the goodies like h/c/i affect the performance of the engine, but in general is the swap better than the 302w...
Posts: 1266 | From: north valley | Registered: Sep 2010
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Duncan Motors
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Member # 7045
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awesome, better than a 347 or 331 stroked in my opinion or in any that that ive ran in. hands down awesome an can be cheap, problems are possible hood clearance with a stock hood,and traction in the beginning gears is tricky. a 302 to a 347 is putting a 302 to its limits, while the 351 kicks 347 ass and the 351 can just be stock an is just beginning at its starting point for performance upgrades. alot of parts interchange, and if u want u can disguise the 351 to be smog legal even with a lil work. some say that it revs slower but i call that bullshit to a average noticing point, i have one in my daily driven drift bucket and it rocks. the stock block and components easily handle 500 plus hp. u can have a cheap 351 that will whoop a expensive high end stroker 302 and if u want u can have a fire breathing 427 351 if u want. i think the block weighs 50 pounds more if that means anything, and all the swap parts can be reasonable bought anywhere.
Posts: 6310 | From: Vallejo | Registered: Sep 2006
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Wht86drop
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Member # 12104
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What about alternator and powersteering brackets? I'm beginning to start a 351 In my cousins coupe so I want to get everything together before I slap it in
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Jalapeña Red 86 GT Vert
Yellow 72 Chevelle
Rio Red 97 Cobra
High-Output Generations CC
Posts: 1669 | From: East Palo Alto, Fiji Islands | Registered: Jun 2012
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Duncan Motors
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Member # 7045
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alt brackets are the same, powersteering brackets can be modified or u can buy from fms with or with ac just like the fox.
Posts: 6310 | From: Vallejo | Registered: Sep 2006
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just_another_ 91
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Member # 9317
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Do you have to change headers? I have Mac equal length Do I have to modify steering shaft
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R.I.P 91 Black LX: 13.45@102.62
Posts: 206 | From: CA | Registered: Jul 2009
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Bent70
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Member # 9694
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Yep, need to change headers. 5.0 shorties flair into the steering. I picked up some bbk ones, fit great and according to the manufacture has eo#, just not on the weld on tag.
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some stangs and thangs
Posts: 356 | From: san bruno | Registered: Dec 2009
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Duncan Motors
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Member # 7045
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dam near every major gd company sells 351 spec eng swap headers for this deal, do not have to mod anything, everything is a bolt in .
Posts: 6310 | From: Vallejo | Registered: Sep 2006
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just_another_ 91
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Member # 9317
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Do you know if they are smog legal headers
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R.I.P 91 Black LX: 13.45@102.62
Posts: 206 | From: CA | Registered: Jul 2009
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Duncan Motors
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Member # 7045
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no not one, the ford fms non coated headers look stock but flow great for shorties. if u can find a set or 302 headers with the carb eo number, grind the welds off to remove the plate then simply tack them on to your new headers of choice and if its done clean enough no one will no the difference, if u buy correct swap headers any 302 h pipe will still work the same as in with cats or non. long tubes or shorties.
Posts: 6310 | From: Vallejo | Registered: Sep 2006
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diablounicorn
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Member # 13033
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im going 351 after i max out the 302. 190cc heads then port those suckers if theres room to port and all the other hci goodies then swap everything over when ready to drop a 351. like ducan said it beats spending money on a 347, my only beef is keeping it smog legal.
another thing to keep in mind on your head selection if you buy 302 heads for a 351 expect 302 power. 165-190cc are consider 302 heads.
[ 2014-04-23, 01:40 AM: Message edited by: diablounicorn ]
Posts: 346 | From: San Diego | Registered: Jun 2013
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tlcluver21
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Member # 9062
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So you don't think afr 185 heads will bring good power for a 351?
Posts: 335 | From: redding | Registered: Mar 2009
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Blow_U_In_Reverse
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Member # 12298
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quote:
Originally posted by tlcluver21:
So you don't think afr 185 heads will bring good power for a 351?
They will make power and a SHIT LOAD of torque.. but they will still be restricting the motor from its full potential.. just depends on ur goals & intentions with the caf.. If ur building a street car, 185cc heads will be great.. thats what im putting on my 351w..
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"Real Men Get BLOWN"
-1993 Cobra "COBRUUH"
-1984 T-Top Notchback
#KurganTuned
Posts: 2688 | From: FiJi-925-650 | Registered: Aug 2012
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tlcluver21
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Member # 9062
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Yeah I got a 79 block and a stock crank that needs to be cut and a brand new set of I beam rods just need to pick out a set of pistons. My afr 185 are the old competition heads which flow very close to that of there 205 heads. So I think your right with a retro fit cam and lifter bars I think the torque be crazy. Thanks forthe info
Posts: 335 | From: redding | Registered: Mar 2009
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