pistons/bore
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New User
Joined: Aug 2003
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From: u.s.a
pistons/bore
ok i'm new. i have a 78 400 getting ready for a major overhauling haven't got my hands dirty yet. i have been up and down these post found out alot of great info for 351c/351m/400 ok heres what i was needing to know would it be better to do the 351c piston conversion or just bore it .20-.30 and put flat heads in. it will mostly be used for mud seenig very little road use. any info would be great
thanks jim
thanks jim
Elder User
Joined: Sep 2001
Posts: 887
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From: Jax FL
pistons/bore
ok its easier to to get 351C pistons and bush the rods. my resons are this, more piston designs that the 400. easier to get, and might be cheaper.
the 400 flat tops are had to find, might still be out of production. you can not get forged pistons made for the 400.
the 400 flat tops are had to find, might still be out of production. you can not get forged pistons made for the 400.
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New User
Joined: Aug 2003
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From: u.s.a
pistons/bore
so i could bore the block and still use 351c pistons and have a better time finding pistons for it correct? and what makes a forged piston better?
thanks for the replys sorry it took so long
thanks for the replys sorry it took so long
Elder User
Joined: Sep 2001
Posts: 887
Likes: 1
From: Jax FL
pistons/bore
the 351C and 351m/400 all have same bore. its just that the 351C and 400 have the same compression height. the only difference is the pin diameter. so yes you can bore the block and still use the 351C pistons, provided you get them to fit the bore, ie. .020 over or whetever you do.
if you are going to run a high cr, N2O, or stress the motor a lot, forged is more durable and needed.
if you are not gonna do any of these, then its not worth the added money.
if you are going to run a high cr, N2O, or stress the motor a lot, forged is more durable and needed.
if you are not gonna do any of these, then its not worth the added money.
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