Some/most of the kits from 440source are good quality, not cheap crap
{like some will say, usually some hearsay from someone that
knew someone BS, not 1st hand experiances}
The Platinum Series "Made in the USA" stuff, are nice pieces
{I haven't purchased from them since 2007-ish, I can't speak to recently}
has done well in a few of my milder street/strip builds 700+hp
I've even gone mid 8's over 150 mph on couple of them with N20,
it's still running just fine, the guy I sold that car too just freshened it up...
It's going on 14 years now, street & track driven...
I've never had any parts failures on any of the stuff I've purchased,
except their Stealth heads
{Stealths org. crap & bad parts, chamber design, long story & they made it good},
But I have the stuff thoroughly checked/measured,
by me & someone that knows their ****, not some flyby night corner parts store machinist...
The rods, pistons, pins, rings, cranks, bearings, machine work,
all checked out just fine, well within all spec.'s,
I didn't buy the entry priced stuff,
I bought Platinum Series, I was kind of selective...
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IMO there are far more pricey parts out there or no better quality too
some great stuff some not so great too...
I've seen some stuff from so called hi dollar suppliers,
that were not better quality & almost 2 times the price...
Depends on what your doing with it, how much of a budget you have
if you can check the parts for proper clearances weights sizes etc.
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If I'm building an all out race car going 180+ in the 7's or faster
I'd chose a few different suppliers, spend a few more $$$'s,
but for most the builds I see here, they have a good selection of
affordable decent priced/really good quality parts...
IIRC they changed ownership/management about {IIRC} 10-12 years ago,
the issues they "allegedly" used to have, for the most part all have been
resolved/corrected changed etc.
I wouldn't think twice about using 440source again
"on another street/strip engine build"
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Opinions vary vastly just make sure whomever's parts you use,
that you have a good machinist that knows what he's/she's doing,
not just some local yokel, wet behind the ears machinist...
IMO that's most important when spending money on a performance build...
Some people just throw $$$ at it because someone else did it that way,
some spend a bunch more than need be too, just spend it wisely, not wastefully...
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Contact Jim LaRoy Challis Idaho,
he's a member here IQ52 he builds this stuff right, great guy too...
Good luck what ever you decide