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  #1  
Old 02-07-2010, 09:06 AM
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Default Building a 351M stroker

So I got my green 78 Bronco and will be getting my tax return back soon. I had some other plans with the money but the old girl needs some attention. The 351 is doggin out on me, lacking power, lacking oil preasure and just aint quite doing it for me. So I am stuck with a dilema. I want power, not an obnoxious amout but just good power. I could easily just swap in a 429 or 460 and be completely happy but I was thinking about pulling the 351 and building a stroker motor out of it. Can this be done relatively cheap? Say aroun 1500 bucks an under? Are there anymore benefits to building the stroker over dropping in a big block? And what do I need to know about building one, is it as simple as boring the block 30 over and dropping in a 400 crank? I just wanna get the best bang for my buck and would love to keep the origional block in the truck to keep it an all matching numbers rig. Let me know what suggestions or comments you guys have. I could really use the feedback before I make up my mind which way I am going with this. Thanks ~Jason
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Old 02-07-2010, 09:23 AM
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There are plenty of ways to wake the 351 up. 400 crank. Summitt has a few different cams just for 4x4s. Port and polish the heads and pay close attention to the intake you get to make sure it matchs the cam good. Find someone to match the intake runners to the head ports for good flow. The one mistake I made was not enough lifter preload and the cam timing anything after 69 was retarded about 4 to 6 degres. I am sure others on here have more info.
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Old 02-07-2010, 09:33 AM
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Quote:
Originally Posted by OneTuffhonky4u View Post
is it as simple as boring the block 30 over and dropping in a 400 crank?
It's even easier than that.. you don't have to bore it... just change the crank and the pistons.... the 351 and 400 have the same 4 inch bore....

and like Buff said... the best way to wake up these old engines are with a good set of heads... I had a set of worked Cleveland 4bbl heads on my old 400 that made it a beast....
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Old 02-07-2010, 09:36 AM
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http://www.chiheads.com.au/
More or to much money but nice
http://www.chiheads.com.au/kaase_c400.php
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Old 02-07-2010, 10:13 AM
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Ya those heads are real nice, not so easy in the pocketbook though lol. I myself have never attempted an engine rebuild but I know what I am and am not capable of. I got a few good buddies with the knowledge who are gonna step in and help me with the whole process.

Now if I take the 351 apart and slap in a 400 crank, will I be using 400 internals from there on out? or are the internals basically the same between the 351 and 400 and would there be any difference or prefence between running the 400 heads on a 351 motor or should I be looking for a set of 351 cleveland heads to have built?

Sorry guys, I am gonna have a crap ton of questions because I am gonna need to make up my mind on what I want to do with the idea of just simply dropping a big block in or building the 351. I gotta look at both cost and the effects of what I get out of each one as well as time. I really do appreciate all the help guys.
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Old 02-07-2010, 10:19 AM
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Like has been said in a bunch of different threads.... the only differences in the 351M and the 400 is the crank and the pistons..... which means the heads are the same too....

Ask all the questions you want... that's why we're all here...
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Old 02-07-2010, 10:25 AM
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Brand COMP Cams
Manufacturer's Part Number K32-221-3
Part Type Camshaft and Lifter Kits
Product Line COMP Cams High Energy Cam and Lifter Kits
Summit Racing Part Number CCA-K32-221-3

Cam Style Hydraulic flat tappet
Basic Operating RPM Range 1,500-5,500
Intake Duration at 050 inch Lift 218
Exhaust Duration at 050 inch Lift 218
Duration at 050 inch Lift 218 int./218 exh.
Advertised Intake Duration 268
Advertised Exhaust Duration 268
Advertised Duration 268 int./268 exh.
Intake Valve Lift with Factory Rocker Arm Ratio 0.494 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio 0.494 in.
Valve Lift with Factory Rocker Arm Ratio 0.494 int./0.494 exh. lift
Lobe Separation (degrees) 110
Intake Valve Lash 0.000 in.
Exhaust Valve Lash 0.000 in.
Grind Number FC 268H-10
Computer-Controlled Compatible No
Lifters Included Yes
Lifter Style Hydraulic flat tappet
Valve Springs Included Yes
Outside Diameter of Outer Spring (in) 1.464 in.
Retainers Included Yes
Locks Included Yes
Valve Stem Seals Included Yes
Timing Chain and Gears Included Yes
Timing Chain Style Double non-roller
Assembly Lubricant Included Yes
Pushrods Included No
Rocker Arms Included No
Gaskets Included No
Quantity Sold as a kit.
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  #8  
Old 02-07-2010, 10:26 AM
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http://seattle.craigslist.org/tac/pts/1579508983.html Are these any good?
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  #9  
Old 02-07-2010, 10:28 AM
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Check this out not bad either
http://www.hiperformer.com/featured_...for_400lb.html
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  #10  
Old 02-07-2010, 10:29 AM
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Jump on these now if you have the cash
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