i have a 454 (3999289 casting) with 353049 head, weiand stealth intake and 4150 850 holley carb, anyone know if the 427 (473478 casting) fit with my head and if it use same intake and 454 crankshaft?
you can't run a tall deck intake on a short deck because the tall deck intakes are too wide, but you can run spacer plates on a short deck intake to make it fit on a tall deck block. Be aware it's also good to get a slip collar distributor so you can properly fit it to the gear, oil pump, and manifold. The gap between the front and rear of the intake and block will be filled with RTV so that's not really an issue. I hope this ans. your question. Have a good one and good luck. J
Also the cranks interchange. The 427 tall deck came stock with forged 8:1 pistons and peanut port heads. If you don't need to rebuild the lower end the 454 heads with a blower is a good setup. But everything else mentioned here is correct and good advice.
if i want stroke my 427 tall deck to 496 with flat top piston i know need 4.25 crankshaft, but what kind of connecting rods length 6.8? and what kind of piston? (454 standard flat top or 496 flat top piston?) because the set up is for my powerboat
This is not a boat forum so I will end this after this post, If you have any questions just pm me for my email. I owned Prformance Marine in Lake Havasu for 15 years and have 37 articles on me building BBC engines and custom rigging so I have some experience in this area. Im taking this is a Baja 265? your 454 is just fine as your 049 heads get your static comperssion up to 10:1 I run a 620 620 lift 232/242 @.050 on a 112CL camshaft dart single plane intake, and your carb is just perfect, good oil pan and cooler and hot ignition get rid of stock manifolds and use a high raiser, you will pull about 12 inches of water with this set up. This will be about all the power you really need in that boat, Im thinking your 265 is a older one with having a gen 4 engine in it. Your hull has no delta pad and the X is quite low much speed out of it you will get some serious chine. you can help with a long tab mounted parallel to your inner strake about 1/8 inch up. Goos Luck happy Boating... now back to the car shit...
Just curious why you would use a factory "tall-deck" block to build a "medium-inch" BB???? Makes sense only on the (tall-deck/4.500" bore) aftermarket deals where you are going to build on a 600" or bigger platform. What I'm saying is, to stay with a 4.250" (nominal) bore it would be better served on the 9.800" platform as opposed to the 10.200" one!! We build these 4.250" x 4.250" (489"/496" deals) constantly and have some very decent HP/Torque numbers depending on the components! (Add) You will be looking at a 500/600 HP "pump-gas" build on the short deck. The tall deck with the long rod will make the same power but weigh more. In a "marine" atmosphere I realize this weight is not a "large" issue, but I would go lighter when I could. If you are hell bent on using the tall deck, all the parts are readily available with some Eagle (ESP) crank/rods and most brand "on-the-shelf" pistons! Thanks, Gary in N.Y. P.S. When you compare both platforms, the 9.800" and the 10.200", the major difference on the smaller inch build is the weight between the two blocks. If you need "ballast" then use the "tall-deck"!!
because i have good 427 tall deck 10.200, i know 454 9.800 deck with 4.25 crankshaft with .060 bore give me 496 with less weight, but is not easy to find 454 4 bolt block in good shape in quebec! and the marine dealer sell it short block for average 2500$ and it need rebuild!!!
hi! thx for reply to my topic. and yes is the older 1988 baja force 265 i know is not a very good performance boat but it's very solid and i have complete restored this boat! i want to built 496 with 427 tall deck (10.200) 4 bolt with my component. i bought an engine from colorado springs engine builder on ebay, i told him is for my boat (baja force 265) i sent him all spec of the boat ''length/weight etc..'' he sent me a 454 2 bolt with weiand stealth intake, #353049 head, comp cam # 11-232-3 (http://www.compcams.com/Company/CC/cam-specs/Details.aspx?csid=403&sb=2). he told me dyno test 550hp/575 torque with 4150 850 holley carb 082 main jet, msd ignition, holley electric black fuel pump with pressure regulator. 94 octane fuel pump. i bought all this component black marine electric fuel pump with regulator, msd marine complete ignition set up (distributor, control box, plug wire) holley 4150 850cfm 082 main jet, EMI thunder manifold with stainless riser. the engine run only 1 hours!!! because the regulator fuel pump doesn't work properly at W.O.T and result cylinder#7 failed!. i disassembled the engine, i look speed pro piston with 0.100 dome, crankshaft grind .030 on rods and .020 on main bearing, my surprise the 454 bore .100 over!!!. this engine now cost me 8000$ for 1 hours!! is not a good deal!!!! now i have nice 427 tall deck 10.200 #473479 standard bore and i want stroke 496 and used all my component (353049 head/weiand intake) i know need intake spacer, 4.25 crankshaft, and bore .060, for result, but i need to know how length of rods and piston type should i use? 454 or 496 (want use flat top piston) run with bravo one 1.50:1
If ya have a 427 tall deck.. you can get stroker kits for them to go well over 600ci there big bucks though...
Thats a 496 the hard way... What year is the block? pop the freeze plugs out see if its siamese bore. alot of the truck 427s are if so I would just make a 572 square out of it 4.5 stroke 4.5 bore with a .250 long rod. A 4.250 crank is the same price as a 4.500 pistons same price so are rods.. When your done make sure you have a good tune for endurance #2 and #7 are your hot spot. Lean is mean but sounds like you need to be a little fatter. And that dyno tune in CO springs is not worth a crap in Quebecs 600' altitude.. I bet it burnt #7 fast where your at. also BBC engines can pocket air in the rear of the heads always drill and tap the rear of the intake and run a #8 water cross over it will help the long holes from beeing so HOT. sounds like you have your mind set on a build good luck.
i just send you a private message. you can contact me through my email also baja265@hotmail.com regard Dan
what i'm thinking is running some 6.535 rods with 3 ring pistons, 4 and 7 swap on the solid lift cam and e85 with about 12.5:1 or 13:1 compression. stroke to rod ratio will like to rev even more than the old school 427. looking for a smooth operator at 7500 rpms. yeah, you can get the same amount of hp out of a 454 or a 496 with less rpms. but i'm not after that, i want a high winding rat. I think the compression will make up for the smaller stroke. and the rpms take care of themselves. but this is just something different i have been dreaming up. it's probably already been done but it's all good.
That is pretty rare. Is it an 8:1 factory forged short block motor? Did it come in a car? I have heard of tall deck 427s in Impala/Biscaine bodies, never seen one though. Most of the ones I have encountered came out of dump trucks.
Thead revival? long time.... Probably because Chevy never made one. Lots of great stories have been told over the millenia.
I answered because I was quoted. I always figured it was an urban legend. I have seen tall decks in cars back when you could still buy a good one and slap a blower in it. Never seen one factory
I saw one in a moving truck, and another in a septic service truck, so they were used for lots of medium duty things over the decades.
They were or are basically a truck motor. I think if you were not about building a blower motor from one it would be a good candidate in a lighter car with an OD (or even a heavy one) and tallish gears. They run well at low RPM and make good torque down low. I got an idea that fuel mileage would suck though. IE 427 tall deck for those who are not reading the entire thread.
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