chevy small block and vortec head #s

ok so i got this 350 small block with aluminum vortec heads the #s on the heads are f2 then right under that is 14101128 then farther down the head i found 6043, what can you tell me about these heads?  Then on the back of the block on the passenger side i found 14088548 and on the front passenger side of block i found V0407ZJS and 1G5902680 right under it can anyone decipher this and give me some info on block please? im gonna swap this into my 78 blazer in place of the worn out 350 thats in it right now, that i just recently rebuilt the heads on only to find out that my bottom end was worn out too  
solid axle chevys cant be beat
78 K5: 350 V8,700r4,np208, 8 lug D44 4:88, 14 bolt 10.5 4:88 with detroit locker and 35 inc parenelli jones dirt grip tires

ok so i did a little of my own reaserch on the web and found that my block was used from 86-94 and it is for sure a 350 and uses one piece rear main seal and has passenger side dipstick, then i checked the heads and found that they were only used from 86-87, they are aluminum, 58cc angle plugs and have 1.94 intakes and 1.5001 exhuast. how all this work in terms of performance? are these heads ripe for power making since they are the center bolt valve covers that means they are vortec heads right?? but only 58cc that sounds kinda small.  
solid axle chevys cant be beat
78 K5: 350 V8,700r4,np208, 8 lug D44 4:88, 14 bolt 10.5 4:88 with detroit locker and 35 inc parenelli jones dirt grip tires

um i dont think chevy started using vortec till the 90s like 96 and up. i think in that era that was still quadrajet  
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You know I love you all (in a manly non sexual way) Spawn_X

When you seek true power you want small chamber for higher CR and you want to run 89 octane or better all the time too. Trying to make 87 work for you costs you power and MPG. Aso on heads, while VorTec head can help top end for sure they will do nothing for low end and will actually take some away with it because of reduced mixture velocity at lower RPM's Their are no free lunches here.  

ya have what ya want there for 4x4 perfomance... as long as the heads check out good.


if someone convinces ya otherwise, I'll be the first one there to pick em up and take em off your hands..  
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see me at robsoffroad.com

ya thats a great setup........run it i prefer edelbrook carbs low maintenance and easy to install  
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You know I love you all (in a manly non sexual way) Spawn_X

Some are just blinded by WOT max rpm performance. Myself I am always more concerned with low and middle RPM power and response in a heavy SUV.  

uhh.. what part of 58cc and 194's did ya miss?

thats not gonna make a high rpm head, it will make a 260 duration cam very very happy along with the owner who just left a patch of rubber with 36" tires and 4.10 gears, for example...  
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see me at robsoffroad.com

the motor is together and all good as in the block dosn't have any cracks nor excessive wear nither the heads, the  motor is topped by an edelbrock 500 4 barrel and an aluminum GM intake im not sure if its a performance intake or not, i thought that center bolt heads were vortec heads but i guess not, so it sounds like i got a prettty good motor for my application huh now the bad part, the motor was installed in a 74 blazer which my uncle bought hes gonna put a 502    in it so he is giving my the 350 , he says that the motor was recently rebuilt and when it was being rebuilt that some retard put the head gaskets on backwards and so water was allowed into oil and now oil pan has milkshake in it, so all i have to do it take off heads put new gaskets on it and put it back together and stick her in my blazer     Jus making sure though my edelbrock performer rpm from my standard head 350 wont fit on this center bolt head 350 right?  
solid axle chevys cant be beat
78 K5: 350 V8,700r4,np208, 8 lug D44 4:88, 14 bolt 10.5 4:88 with detroit locker and 35 inc parenelli jones dirt grip tires

mudb8-.:
ya have what ya want there for 4x4 perfomance... as long as the heads check out good.


if someone convinces ya otherwise, I'll be the first one there to pick em up and take em off your hands..

if someone convinces ya otherwise, I'll be the first one there to pick em up and take em off your hands..  

 nice try mud, but im keeping the motor and heads but now i have that other 350 with the freshly rebuilt heads that im not sure what to do with..... take it apart again and rebuild the bottem end, while putting some hi po parts on it at the same time, plus ive never done a bottem end rebuild so it would be fun learning experience or sell the motor as is cuz it still runs just with low compression or just sell the fresh heads???  
solid axle chevys cant be beat
78 K5: 350 V8,700r4,np208, 8 lug D44 4:88, 14 bolt 10.5 4:88 with detroit locker and 35 inc parenelli jones dirt grip tires

I'd be checking out the intake gaskets before tearing off the heads they may have put a genI intake on the center bolt heads.... even if the head gasets are upside down its not likely gonna leak. I'd use steal gaskets and a coat of copper instead of a thick felpro or the likes.  
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see me at robsoffroad.com

ok so if what ive been told is true, i hope it is , the motor is mechanically sound so what do i look for to solve the water in the oil problem? Head gaskets and the intakes as mud said...... what if the it isn't a case of improperley installed gaskets but rather blown head gaskets!!!   what would happen then  
solid axle chevys cant be beat
78 K5: 350 V8,700r4,np208, 8 lug D44 4:88, 14 bolt 10.5 4:88 with detroit locker and 35 inc parenelli jones dirt grip tires

its a rare if ever thing to find a sbc with blown head gaskets, generally blow gaskets pump air through the cooling system and not water into the crankcase. you should be able to tell by looking at the gasket when you pull the intake if it the leaker, if it does have a genI intake on it it'll have the holes redriled and enlarged to get the bolts to go in at the different angle.  
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see me at robsoffroad.com

Vortec heads are awesome they arn't a.f.r's or brodix's but they on the average make 20-40hp more than a stock head. They flow really well and do not need porting. they can make big hp that stock heads can't research engines that big big #'s with these heads. Another reason they are a popular head is they are dirt cheap compared to afr's etc. the older vortecs had to be machined for highlift cams and was a little spendy, were's they newer versions are built to run big cams plus there aluminum! the used the small chambers to bump compression about a full point. If you do not have 1000 plus dollars for the big name heads these are about the only way to go. get in identical vehicles one with standard heads and one with vortecs it's a huge difference.

These heads make big differences in bottom mid and topend look at the flow charts and you will see. Your just limited on intakes and valve covers. I would run a airgap with these heads. The older versions were limited to around 420" of lift max which is a small cam and would not do to much for topend power and was the reason for machining to accept big cams.  

well i checked the numbers on my edelbrock manual choke carb that is on the 350 that is currently installed in my blazer right now and guess what i deciphered................. it a frickien 750 cfm carb on a 350!! who would do that...... now my question is would running that big of a carb cause my truck to have to rich running problems it has now like: itll bog if floor it all of a sudden, itll shoot out black smoke from the exhaust when i floor it like a chipped diesel and it gets like 5 mpg  also the exhaust is really smeelly and will make your eyes water like no onion youve ever cut before  
solid axle chevys cant be beat
78 K5: 350 V8,700r4,np208, 8 lug D44 4:88, 14 bolt 10.5 4:88 with detroit locker and 35 inc parenelli jones dirt grip tires