: I'm ready too put oversize valves in a head
: thats ported and don't want to blow it
: working with my machinist we got our wires
: crossed he ordered valves for a 340;
: 1.88(I),1.60(E) instead of 1.70(I),1.44(E)
: as in "Slant Sickness" (Hotrod
: November 200).So today I called him to check
: on things and he says "hey those valves
: just touch each other, won't work" Well
: what came out of this miscommunication might
: be a good thing, he said "you know what
: I would do is use the 1.70 for the intake
: and the 1.60 forthe exhaust,I can make that
: work,it will take some grinding to eliminate
: shrouding". Now I trust him, he's done
: great work on the short block but we both
: agree it would be better to colaborate with
: someone(s) who has tryed this or has a
: opinion about it.

: 340 valves are about .200 too long. They will
: most likely need to be cut and
: regrooved(expensive) I optioned for
: 1.94/1.50 sbc stainless valves(which are
: cheap), but you need to use 11/32 guides.
: They measure about .100 longer, but once
: installed, they only sat about .075 higher.
: The intake was turned down to 1.75 as well.
: I used big block mopar valves, and offset
: Crane retainers to get the proper installed
: height. Hope this helps.

: Thanks for the info. the retainers were a good
: tip and it sounds like I can go stainless
: now just curious what are you useing for
: intake and carb?

: I have a Clifford 4bbl intake, and a 600 holley
: carb. I also have a Racer Brown cam, 254 at
: .050, and just over .500 lift. I can post
: some pics of the head if you are interested.
: It's been professionally ported. The one
: nice thing about running sbc(sorry for the
: swear words, lol)valves, is that there are
: numerous retainers and locks for any
: application. I purchased my valves off Ebay
: for under $100.00 for 16. (Manley pro-flow)

: Another option is small block Ford. They are
: the correct length and you can get a 1.70
: intake that is a "drop-in". The
: exhaust has to be tuned down a little to get
: the 1.50. For springs and retainers, 340
: parts are also "drop-in". I don't
: remember all the part #'s but that is what
: J&M used on my head. Dennis

: Dennis--
:
: I think MP springs you're talking about are:
: P4286813--IH:1.65/1.70"--single/damper--OD:1.39"--lift
: range:.390"-.450"
:
: retainers: P4452033--chromoly--8 degree
: lock--3/8" valve stem--for single
: spring
:
: Koller Dodge has @ about $3 a pop:
: <A HREF="http://www.kollerdodgeparts.com./">http ... s.com./</A>
:
: other small block MP springs that pertain to /6
: usage:
: P4120249--IH:1.67/1.70"--single/damper--OD:1.50"--lift
: range:.430"-.500"
:
:
: P3614542--IH:1.67/1.70"--dual/damper--OD:1.45"--lift
: range:.500"-.610"
:
:
: P3412068--IH:1.68/1.70"--dual/damper--OD:1.46"--lift
: range:.520"-.620"
:
: hope this helps
: ---Red

: Another option is small block Ford. They are
: the correct length and you can get a 1.70
: intake that is a "drop-in". The
: exhaust has to be tuned down a little to get
: the 1.50. For springs and retainers, 340
: parts are also "drop-in". I don't
: remember all the part #'s but that is what
: J&M used on my head. Dennis

: Dennis, I think the ford valves are 11/32,
: which would mean you still need different
: guides and retainers.