PAW 427 Stroker Kit in a 351W

khsmach1 · Dec 28, 2004

Hi all. I'm new to the forums. I joined up to hopefully learn some new things and fill in some missing gaps in my knowledge of cars...which there are many.

My question is in regards to this article I found...

http://www.mustangandfords.com/techarticles/35939/

I have a 1969 Mach 1 with a 351W in it and have been considering putting in a stroker kit, but I don't know anyone who has used one on a classic mustang.

It seems like a pretty radical idea for a stroker kit. Chrystler connecting rods, a crank from a 400M, etc... And does anyone know if any problems would arise from having your block bored .060 over? Or any other problems that might be cause with this kit for that matter?

I'm kind of timid about such a drastic stroker kit but the thought of squeezing 427ci into my 351w is very tempting. Any feedback or insight on a kit like this would be much appreciated. I look foward to seeing yall around the boards. Thanks

Max Power · Dec 28, 2004

There arew a lot of manufacturers for 427 stroker kits now that use parts made just for that, although the 393 and 408 kits seem to be more popular. 427 is pretty extreme and those motors don't last as long.

Don't go .060 over unless you have to.

94CobraPace · Dec 28, 2004

I agree on the .060 over, getting close. There are other kits out there, DSS, Central coast, pick up a Muscle Mustangs & Fast Ford magazine, there are plenty of advertisers in there. For me, I would choose the 393 due to the lower rod to stroke ratio to where the piston is not pushed into the side of the block. The loss of 30 cubic inches is not worth it in my opinion, especially for a street car that will have miles put on it more than a 1/4 mile at a time.

khsmach1 · Dec 28, 2004

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Thanks for the input guys. For the most part I would like to keep it a streetable car. I saw that a member, TheHueyPilot, had a 427 stroker kit from Coast High Performance and checked them out. Seems they have a 393 and a 408 Stroker kit that wouldn't damage my wallet too badly, and also don't have to go .060 over.

Am I getting in over my head going with a stroker kit on my first engine build? Thanks again for the help. Can't wait till I have something to update with.

jaredgoodwin · Dec 28, 2004

Don't forget you would need some aftermarket heads that can support that many cubic inches, and a cam, and the right springs, and rocker arms, and and...... You see it can add up fast. You also need to consider the strength/age of your transmission and rearend and factor that in as well.

Max Power · Dec 28, 2004

In all honesty, you should find a vendor that will build you a nice short block stroker all balanced and ready to go. While it may seem more expensive at first, after you add in all the machine work, it will be about break even and less hassle, especially if you are a first time builder.

I bought the Coast 393 kit. First I got the wrong pistons cuz I needed to go .040 instead of .030(not their fault). Then they sent the wrong pin size rods(their fault), so they needed to be swapped out. Then there is the grinding to clearance the crank where it hits the block, where it hits the oil pump, where the crank hits the pistons, etc. And this was a 393, the least extreme of the strokers.

At the end of the day, even for someone who has built a lot of engines like me, a completed short block would be the way to go.

khsmach1 · Dec 28, 2004

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I'm glad you mentioned that Max Power. I know my goal for my engine and want to dive in and gain the first hand experience of doing the build myself...but when the factors such as machining come in I will be over my head

PAW 427 Stroker Kit in a 351W

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