I have been real happy with the 418" my Dad and I built in 2015. It has somewhere around 7-10,000 miles on it and a few hundred passes, and 4 drag weeks now. The ring seal is still excellent and it usually sets a new best every year as other parts of the combo are refined.

It's an eagle forged crank with Molnar rods and Autotec pistons. Its a 10:1 pump gas deal. Its been 10.42@126.8 in my 3550lbs 68 Barracuda. I think 6.57@102.5 is its best 1/8th mile off the top of my head.

I gave been thinking of building a 408 out of My other 360 magnum engine I have. So thanks to the op fie making this post. To every one that has built one. What do you think about this kit. I think with my 60 cc trick flows I will have around 12.5.1 compression.



Scat 4340 Forged crank, 360 mains, 4.000 stroke
Scat H beam rods, 6.123 Length, ARP8740 rod bolts
Icon IC969-STD pistons ( standard 4.000 bore) this is a special order
Performance file to fit ring set
Clevite H series bearings
$2380.75 plus shipping

Better have a real nice block with almost no miles if you want to run standard bore pistons. The stock piston ring does not go as high up the bore as most aftermarket pistons so any tiny imperfection will un-seat the ring at the top of the stroke and lose it's seal potentially costing power and MPG and reducing engine life.

I've got most of the parts I need to build a 383 C.I. 360 stoker motor, new premium cast iron Mopar crankshaft from years ago offset ground down to SB Chevy 2.00 rod size, SB Chevy 6.125 long rods, the pistons need to be order along with the cam and so on.
I'll use a set of the Speed Master CNC ported aluminum heads with a single plane, maybe a dual plane intake, and make it for pump gas to sell to someone wanting a good motor (near 400 HP) at a reasonable price
Probably be the last SB Mopar I'll build, Gen 3 hemi time