Trying to understand options and discovered ATK’s 408 stroker short block. Looks to have decent internals Scat and such.
Anyone have any experience With these?
Anyone have any experience With these?
ATK 408 Short Block
- Thread starter 340inabbody
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Running a Blue Print 408 in my car and I'm very happy with it.
FlamesAreWicked
Well-Known Member
I considered going the same route.. I think there’s two levels of short block..I think the difference is the rod choice. They’re 5.9 magnum based and I think those are balanced internally. I ended up finding a 340 though so I went that route instead. One of them was $2999 through summit… at least earlier this year it was.
Yes. I am also considering a Blueprint.
I'm very happy with mine bought a turn key from them back in 2019 and never a problem after 15,000 miles. Long 1,200 mile runs is no problem.
crazydog
Well-Known Member
Nope, according to the website the difference is the more expensive short block has a forged crankshaft and forged pistons.
Chrysler Short Block
The 408 stroker from blueprint is cheaper thru summit with free shipping. Faster turnaround too.
AND you can use a 10% off coupon when they're available. My buddy saved a bunch that way.
10%?
Summit gives away 10% off coupons at various car events. Those discount codes are often shared on forums such as FABO.
Thats like $1000 of a 10k crate motor. I wonder if they were good for crate motors from ATK or Blueprint? Ill keep an eye out as I wrench on my 340 and 318.
Yes. Two years ago my buddy bought a BluePrint 350 Chevy engine that way. It's 10% off anything except sale items.
mopowers
Well-Known Member
You could open a Summit speed card too. They often have 10 or 15% off promotions on purchases where you use their card. It may have a cap though.
Here is the dyno sheet of the 408 that was recently delivered from Blueprint:
It came with a Blueprint air filter lid. I had to change that immediately. LOL
What do the heads have printed on them? I assume Edlebrock but can’t quite tell? Is it a modified head? Do you know who makes the lifters/rockers?
middleagecrisis
Well-Known Member
From the dyno sheet above it looks like power starts to drop off at 5500, perfect from a reliability standpoint!
4eighteener
Well-Known Member
Is that gooseneck a blueprint part or something you bought aftermarket?
That would be useful to me if anyone knows who makes it
A while back a fellow in my town bought an ATK BB Chevy. I wasn't really impressed, power was not there. My distaste rose when I saw the cheap offshore rocker arms, I looked into it no further.
furrystump
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I bought a complete 408 engine back in 2009. Very happy with it. Still running the block/crank/rods. It’s on the stand to be freshened up for the second time. Well over 60,000 miles and thousands of passes on it over the years. During the last refresh (piston swap) the bores were straight and round. We’ll see this time.
From who?
furrystump
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Sorry, Blueprint.
The heads are Edelbrock modified by Blueprint Engines. I encourage you to contact their sales folks and ask the specific questions. They know their stuff! I recently installed the 408 into my 70 Duster w/727 and 8 3/4 3.55 and am thrilled by how well it runs. Actually have a traction issue now. BFG tires don't get the job done! You pay for what you get in the engine package, and their warranty is outstanding. I do not care for the Holley 750 they ship the engine with so I changed it for an AVS2 800. After I installed the Carb Cheater and tuned the carb it runs super clean and has gobs of git up and go.
This is mine on the dyno from blueprint
Thats how you want flat torque all the and fast rising hp nice! Thats the Blueprint right?
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