If you do, do a Gen 3 hemi swap
2009 to current Eagle heads, much better heads on the second gen of the 3rd gen.
Hemis, better ports, & bigger valve sizes & more compression & flow 330cfm stock,
vs the earlier 2008 & prior versions 260cfm
the early 5.7's can't put much camshaft in them, tight valve clearances
not worth it
way more valve to piston clearances in the 2009 later
the 2nd gen./of the 3rd gen. Hemi's 2009- current/with the Eagle heads
If you do a 440 3.75" or bigger stroke in the 383
I'd highly suggest buy it in a kit form save the hassles,
get it from either 440source in stock (hard to beat them in price) USA made/strokers
decent quality good rods, pins & pistons, cranks
or our member
@PROSTOCKTOM has some nice looking kits too
I've had several 383/479cid 4.15" stroke & 4.290" bore (0.040" over)
from 590hp to 720hp, no failures on any of them
I like the smaller/lighter (50#s)/narrower, more hood clearance
package of the B-block/low-deck
(
albeit a 400 block is a bit better, has thicker main webbing
& a lil' bigger (0.070") 4.34" std bore (bigger helps with cylinder head flow)
but if you're not spinning it to 7k all the time then the 383 block should do fine,
they are weaker in the main webbing)
The 1st one I built with a 383 block was a 431.6+cid @ 0.030" over,
a 4.28" bore with a 440, & a 3.75" crank
it's lots of machine work (before all these co.'s offered kits)
needed to turned down to 7.125" on the counter weights,
about an 1/8" appr. 0.120" taken off
& reground to the b-engine 2.625" sized mains journals (440 main is 2.75")
the rods ends/journals are the same as a 440 size 2.375"
I used Eagle rods, H beam, decent priced & strong, with the rod bolt/cap style
Custom pistons are expensive, & timely waits for them too...
many of the 'stroker kits' out there
come with a BB Chevy sized 2.2" big end rods/rod journals, lots of rods
(could have side clearance issues, because the rod is narrower)
& but there's lots of piston & pin selections that way too
albeit I didn't ever go that way
383 is the same std. bore size as a 427 (3.75" stoke)
or 454 (4" stroke) MkIV BBC
(or a std bore of a 426 Hemi, if using a flattop piston)
compression height;
top of piston to centerline of the rod/piston pin location
is what is needed to know, when ordering customs
& valve sizes, depth of reliefs (how much gross valve lift),
0.100" clearance for Intake & 0.120" for exhaust
the piston chases the exhaust valve up, so it takes a tad more clearance,
unless it's/camshaft is really advanced
if you're not going over 0.520" gvl (gross vale lift, rocker ratio x cam lift),
& use a 0.039" compressed head gasket
you don't have to worry much
but a camshaft with 0.520" gvl the stock iron heads will need
the top of the valve guides cut down,
so not to interfere with the spring retainers at full lift
anyway you get the gest...
