I don't know if anyone has a completed engine yet with this exact combo.

We do know the 400 crank can be offset ground to a 4.17" stroke. They used these in 351W strokers long before aftermarket cranks were available.

Read K. Moore's 434 stroker for 240 rod mods.
http://members.tripod.com/lyc_42/km434/km434.htm

Pics are no longer available but you can read the text. The 240 rods were narrowed and rechamfered. I think it would be easier to widen the crank journals instead. Anyone?

Kenny bushed the 240 rod .912 opening to .927 for the Chevy pistons he chose. If you check around, almost all stroker pistons use the .927 pin size.

The Chevy valve reliefs are in the wrong place so he added another for the 400 intake valve location. He was able to get away with a small relief because he had small 2V valve with mild cam timing.

You can skip the two last steps by using a common piston that was originally marketed for a 351C engine using Australian 302C 6.025" con rods. There are 2 hypereutectic flat tops pistons available from KB or ACL. .912" pin size and valve reliefs in the correct location make these pistons a bolt in, unlike the Chevy piston.

If there are any problems with this, no one has brought it to my attention yet. The only addition costs from a non stroker rebuild are $180 to offset grind the crank and $80 for the 240 rods. I can live with that.

 

Thanks for the info guys I called a local crankshaft place here in Denver, CO to ask about the grind for the stroker we are talking about here and they want $350 this grind.:-staun That seemed a little steep to me especially since brian mentioned $180 for the same thing. I didn't ask about widening the journals after he gave me that price. Will look for other shops in town.

Matt how's the searching going? Keep me posted on your progress. Did you find 240 rods?

Finally got to read that link on Kenney Moore's 434. It was down for awhile for too much usage. (aparently it has become a little more popular since it was posted here) After reading this build and his choice on a cam, I have a couple of stupid questions to ask. Does this build affect the choice of cam? My original cam choice was Comp Cams 265DEH.(Duration in.265 ex.275 lift in .484 ex. .510) Also I was planning on a static compression of about 9.2:1 before I starting thinking of a stroker rebuild. How does this build work with this compression?

 

Speed-o-motive inc.

Custom Machine Work
Micro Polish Journals add $30.00
Lathe Cut Struts add $80.00
Cut 1/4" Key for Blowers add $49.00
Stroker Offset Grind add $185.00
Metal Lax Stress Relieve add $90.00

 

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was the 240 in the little farmounts like the 77 models ???? whats size are themmotors also if a 400M is a smallblock then a set of 289/302 heads fit these motors right????? I think we need a ford system of small meduim big or wide

FORDS always look better when pulling a CHEVY

 

The rods came in '65-72 Ford trucks.

289/302 heads will physically bolt on a 400 block but there are no intakes available. The engine has a big block height and width but a small block length.

 

>The rods came in '65-72 Ford trucks.
>
>289/302 heads will physically bolt on a 400 block but there
>are no intakes available. The engine has a big block height
>and width but a small block length.

OK the 289/302 heads will bolt-up and you can get adapter plates for the intakes... But one has to ask yourself Why would you put them punnie ports on a 400 that can pump twice as much air/fuel as a 289/302....Take a 289/302 heads (Boss 302 heads don't apply ) and put up against the 400 or 351c 4v head and ask yourself which one flows more.

 

I found a total of nine totally functional straight rods there are about 12 other that I think could be straightened if that is even possible. I will give them to you for free if you still want to go through with a stroker build, sampsin. I dont know what it would cost to have them straightened, They might not even be bent yiou would have to have them checked.

 

The 240 I6 was also used in several full-sized cars from 1965 to 1972.

'65-'72 Custom, Custom 500, Galaxie 500
'68-'69 XL 2D and convertible
'65-'69 Ranch Wagon, Country Sedan, Country Squire full-size wagons

 

'65-72 Full Size. Yep, I stand corrected. I've never seen a 6 cyl. in a Full Size Ford but I guess they did have them.