ATTN: Grumpyvette/others

[Guest]

heres what i've put together so far;

i picked up the block and it looks okay for the 383 build-up.

and i talked the seller into tossing some stock heads from a 350 that was in a full size van and a camshaft,

my question is this:

1.can i still grind the cams to my specs for the buildup and still make that kind of power (380-400bhp)

2.can i work with those heads as well to get the same #s 'cos at this point i font want to buy heads at all.i'd much rather work with the ones that came with the deal so pls tell me what to do to it to as well as a street port to make that kind of power or at least close to it.

Thanx again

jav240z

("AN I-6 DOES NOT A SUPERCAR MAKE")

[grumpyvette]

short answer, yes stock heads will work but they will take MAJOR MACHINE WORK THAT WILL COST MORE THAN THE GOOD AFTER MARKET HEADS and they still will not produce anywhare near the hp that the after market heads will, your looking at about a 50hp-120hp handicap over good aftermarhet heads.either do it correctly of be satisfyed with less than 400hp even with minor head mods or under 450 with head mods that cost more than the better heads will.

[Mikelly]

You need to tell us what the casting numbers on the heads are. Most likely you will not get the performance out of it that you want based on the amount of money you will have to put into them...

 

Just My opinion, but Grumpy will need the casting numbers to tell you if the heads are worth it.

Mike

[Guest]

first off where do i look for the casting # on the block secondly grumpy what kind of # will i be looking at if i get a street port replace the valve,valvespring,rockers the works?

and what about the cam what sort of spec to i grind it out to?

as far as the hp amount i mean i'm not so sure about that #anyways anything over 300bhp will do me just fine the higher over 350 i get the better.

OR just tell me the max hp i can hope to get with these heads provided i clean it up.

 

OK i think i found the #'s

one of 'em had the #'s 14079261 on it it also had A166 as well

the other had 14079261 on it as well and had

K275 on it too.

thanks again

JAV240Z

(AN I-6 DOES NOT A SUPERCAR MAKE")

[Guest]

now based on that #14079261 and the link you posted to mortec i was able to verify that the heads are from an 86 350 what it didn't say is whether its from a truck or what,now when i take the heads down to a machine shop tell me(quote,unquote)exactly what to ask them to do,also what parts to buy myself for the heads.

now with the cam can i grind the one i have to the specs you gave me,'cos i'd rather work with them too.

thanks again

JAV240Z

("AN I-6 DOES NOT A SUPERCAR MAKE")

[grumpyvette]

get a price on ((a pocket port job with clearanceing for a .550" minimum lift,cut the spring seats for larger new high performance springs,add the new springs,add new screw in rocker studs, add new 2.02" intake valves and 1.6"exhaust valves and a 3 angle valve job and lengthen the pushrod slots for a higher lift cam, clean and remove any casting roughtness in the ports and clearance the valve guides and add new valve seals and check and replace and worn valve guides)) now if the price for doing that(minimum work) to your old heads even gets close to $869 use them for door stops and get these,

 

http://www.flatlanderracing.com/index.html

 

10621122 IRN 215/72 ST 2.05/1.60/1.437D $434

 

they have all that work already done plus much better flowing ports

[Guest]

THANX again grumpy,

wish i could get those heads u referred me to but no one knows of them here and shipping will kill my pockets,

assumming the cost does go higher than you said then i'll go for aftermarket ones, and according to you they MUST be iron instead of aluminum right?

ALSO you haven't said much about the cams,what do i ask them to do to it?

thanx

JAV240Z

("AN I-6 DOES NOT A SUPERCAR MAKE")

[Mikelly]

Javv,

Grinding that cam will likely be more expensive than any cam you can buy for the current configuration you posted originally... A good cam KIT with matching springs and lifters is gonna run you $200-230. Also, add in the screw in studs, push rods, and new rockers and you will easily get into the $500 range JUST for the parts listed... However, the cam alone will be cheaper to buy than have ground.

Grumpy can verify this...

Mike Kelly

[Mike C]

Summit has those heads as well and they have free shipping. I wouldn't waste my money on a set of '86 heads castings unless they were the L98 aluminum heads, and even then you'd be better off with aftermarket heads. Small chamber heads (69-70 with bolt holes) are the "good" GM heads, but not easily found anymore and figure on spending at least $600 R&Ring them, NOT counting port work. Dollar per dollar the aftermarket heads are money well spent.

[grumpyvette]

aluminum heads ARE BETTER THAN IRON HEADS and will allow more compression and be less prone to detonation problems. the only reason I suggested the iron eagle 215cc heads is you rejected the much better 223cc canfield heads I first suggested, (Im assuming because you don,t realize the hp per dollar spent is better with the canfield heads) and as far as cams go getting your cam ground to CRANE #114681 (aluminum heads)or comp cams xe274(iron heads) is cost foolish as both of those cam/lifter kits are available for about ($150 U.S.A.)

 

and you can order the heads direct from the manufacturer

http://www.canfieldheads.com/sbc_2600.html

[grumpyvette]

the casting numbers are normally near the springs on some heads but read this,

http://www.mortec.com/location.htm

 

http://www.mortec.com/castnum.htm

 

now even the best sbc heads out there that ever came on a van (most likely vortecs) if your (SUPER LUCKY) only flow 230cfm and most like the much more comon #882 heads flow only about 208cfm, thats a big drop from the 270-301cfm of good aftermarket heads but lets say you port and clearance and add new springs too your iron chevy heads, now if you build that 383, add a matching cam like a xe274 comp cams hydrolic flat tappet cam to save money, a victor jr intake and matching 1 5/8" headers with a 9/1 cpr to prevent detonation,

that combo will get you about 370hp and 400ft lbs now thats more than enough to make a (z) move well but thats noware near the hp you were talking about before of course its no ware near the total cost either!