tall deck big block info 366, 427

[blazin_blazer]

the 366 has the same crank as your 396, except its forged steel and factory nitrated, same goes for the 366 rods...when you build your 396, use the 366 crank & rods, they are alot stronger...even if your 396 has a forged crank already, it wasn't nitrated(hardened)

 

[bftank]

sbc serpentine onto talldeck

found some new stuff for tall decks, i believe intake manifold spacers were already mentioned, but while searching pirate and found mtblazer87's build up entitled foolsized blazer build where he mention some adapters to install the small block serpentine stuff on the tall deck motor he had. he got them from http://www.kwikperf.com/products.html. they make the same bracket for regular big blocks to. requires changing water pump to make it work and some other stuff.

 

[Speedo]

i toyed w/idea of using the tq monster 366 bbc i have, but the weight of it makes me think of just using its crank&rods that are factory nitrated in a 454 block and some good heads for a 427 bbc, but most my projects i've built lately, have been gettin a 97-99 5.7vortec w/ a gmpp carb intake, about 400 hp for around $1500 total

The process is called nitriding and involved immersing the crank in heated cyanide based salt bath. Chevy called the process Tufftriding. Today the nitriding process is done in a heated oven in the presence of nitrogen.

Gus

 

[obijuan]

soo, pretty regularly i see 366 come in and was wondering if they would be a good swap for my 84 dually. tow rig swap. they are always on propane and really clean. my 454 is at 90k and this is the just in case plan. i can typically get them for iron price, and they have some sweet header lookin things. i figger they can move a bus....
4x4high, what say you?

 

[dirtygoat]

When I was looking for my bus, I saw a lot of then with the 366... They can pull... I drove a 35' bus with one and it pulled harder than my tbi 454 in the crew cab...

 

[folkenheath]

I respect you guys for dealing with these things and making them work for your rigs, as long as you are happy with the performance, that's what matters.

However, there is a reason the 366 has a boat anchor reputation, it's because its the weight of a big block (or more: thicker, taller castings) with the displacement of a small block. They were only created to last a long time, past the standard 100k - 200k miles, the power/weight ratio is pretty low. But with the right gearing, they did what they needed to do, and kept on doing it.

The 427TD is a different animal though, I have built a mild 496 out of a 427 block that made 650 hp on pump gas. Of course the same engine could be built on a regular 454 block, the rods would just be shorter, which is a whole different can of worms.

Also, be careful with the nitriding. Because nitriding is only a few thousands thick, and if you have the crank turned for new bearings, then the nitriding is gone unless you send it off to have it nitrided again.

I would like to build a 540 or 555 standard deck someday if I could ever save up enough money, now that's entering big block territory!

 

[GMC500]

I've used heads out of 366 BBC on my 454 build
they have the true large oval ports like 781 & 049 heads but tiny valves
but after installing the 2.19/1.88 valves & boring the valve openings to match the valves, they perform just like any other 781,049 heads
I've used them because true large oval heads are very rare where I live
and it will be much better to upgrade these heads instead of upgrading the peanut ports which are available everywhere

 

[4X4HIGH]

Also, be careful with the nitriding. Because nitriding is only a few thousands thick, and if you have the crank turned for new bearings, then the nitriding is gone unless you send it off to have it nitrided again.

I would like to build a 540 or 555 standard deck someday if I could ever save up enough money, now that's entering big block territory!

Actually, Nitriding penetrates about .015" deep and tufftriding only penetrates about .003-.005".

 

[folkenheath]

Thank you Scott, I wasn't aware of the difference between the two.

 

[76zimmer]

Actually, Nitriding penetrates about .015" deep and tufftriding only penetrates about .003-.005".

And cryo treatment goes all the way through.