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By Kahuna - 10 Years Ago What is the largest dispacement possible for a 292 V8? That is, largest bore & stroke? Thanks Jim By Ted - 10 Years Ago Jim.  Welcome back as the word was you were not feeling well.  Trust you’re feeling much better at this point.   I’ve assembled several 375 inchers which have been holding up well.  These are a 3.860” bore with a 4” stroke.  I have experimented with varying rod lengths in all these and the dyno results are interesting.  In the past I have built a 403 inch Y but it had cylinder issues.  I am currently working on a 390/392” combination that is expected to be durable while not involving anything elaborate in the camshaft profile in which to clear the connecting rods.  The "390" has a nice ring to it but so does "392" so I can go either route without a lot of difficulty.  "Difficulty" is a subjective term at this shop.    Jon Kaase had a 400” Y at the 2015 Engine Masters Challenge which got there by way of a 3.869” bore and a 4.250” stroke.  The camshaft in that engine was a one off steel grind with some varying base circles in which to clear the connecting rods.  My own combination at the EMC was a 362” combination with a 3.860” bore and a 3.860” stroke.  That combination came about simply due to having those parts sitting loose and not enough lead time when the 2015 EMC rules came out in which to order a 4.00” stroke crankshaft to make another 375” combination. By 62bigwindow - 10 Years Ago Welcome back Jim. I hope all is going well for you. What kind of hp and torque numbers are you getting out of the 375? I'm going to need another engine built for my F100 project. By Kahuna - 10 Years Ago Thanks guys for the concern. Yes, I was sick & for the first time in my 70 years ended up in hospital with pneumonia. NO idea how I got it. Slowly recovering. Ted I sent you an email re this same subject, as I'd like to build another engine for my 56. Would like to chat about it  when convenient for you? I was hoping for something in the 350+ range or more, if my budget will stand it. BTW, what is the availability of the aluminum heads? My problem is that the car must remain an automatic so the wife can drive it, which, of course, limits the cam choices. I'm not looking for a race engine of sorts, just something in the 300+ HP range, if that's doable? Hope you all have a great & Merry Christmas Jim By Ted - 10 Years Ago Jim.  I haven’t received an email from you as of yet. Cubic inches is the quickest route to increased power levels.  Going beyond a 3.600” stroke typically requires a custom made crankshaft and that alone is a $3000+ hit to any budget.  Offset grinding a stock 292 or 312 crankshaft brings the crankshaft costs down considerably but also limits the cubic inches.  Aluminum heads in place of G or 113 heads are typically worth at least an additional 50-60 HP; even more HP becomes available when aluminum heads are used to replace the smaller valved iron heads.  Reducing friction is another key player in making more power and that’s easily accomplished by using metric sized rings which reduces both the direct cylinder wall friction and the radial tension that is much greater with the stock ring sizes.   With all that in mind, check out these links to previous engine build combinations.  Some of these are with iron heads and others with aluminum heads. Ford Y-Block – Stock Iron Heads Can Still Make a HP to the Cubic Inch Ford Y-Block – 330 inchers, aluminum head and iron head versions are both dyno tested. Ford Y-Block – 318 inch buildup using aluminum heads By Canadian Hot Rodder - 10 Years Ago Kahuna, I came mighty close to 300 HP through with stock manifolds on my motor and we were only at 296 CU". As I am sure Ted will attest, 300 HP can be easily achieved with a motor over 300 cu"!  Also My motor is quite street-able. i am running a manual trans, but I am sure it would work well with a good stall converter!   By Kahuna - 10 Years Ago Merry Christmas to all & thanks for the infomation Ted- I sent the email thru this forum. Is that not the correct way to do it? Rob- What cam did you use on the 296 engine? Thanks Jim By Ted - 10 Years Ago Kahuna (12/25/2015) Ted- I sent the email thru this forum. Is that not the correct way to do it? Jim. The forum email account seems to be hit and miss on forwarding emails.  Try emailing me directly at eatonbalancing at yahoo dot com. Ted. By Ted - 10 Years Ago Kahuna (12/25/2015) Rob- What cam did you use on the 296 engine? Thanks, Jim See if this link to a past post helps. http://forums.y-blocksforever.com/FindPost112706.aspx