Vortec Heads??

[5SpdTy]

can vortec heads from a 93 4.3 jimmy bolt directly up to the typhoon block and intake manifold without alterations? ive been getting mixed answers and was just wondering what is true.

 

[dgoodhue]

Re: Vortec Heads??

93 aren't true Vortec heads 96 and newer are (Using Vortec designation as following the cylinder head design of SBC V8 Vortec Heads)

Its probably LB4 (stock) or L35 heads which yes both bolt up, but the engine may have been called a Vortec V6. The Vortec V6 designation was over used and doesn't really stand for anything, beside maybe high output. My 91 Syclone literature calls my Sy a Vortec V6.

 

[Jimmy]

Re: Vortec Heads??

The "real" Vortec heads came out in '96 and require modifications to fit. The L35 cpi heads and the LB4 stock heads will bolt right up.

 

[kessler]

Re: Vortec Heads??

Oh Uhm well i just picked up a set of 2000 vortec heads will these work or did i just screw my self

 

[Jimmy]

Re: Vortec Heads??

Oh Uhm well i just picked up a set of 2000 vortec heads will these work or did i just screw my self

They need to be redrilled for our bolt pattern,and the lower intake manifold needs to be modified as well.

 

[SpoolingTurbo6]

Re: Vortec Heads??

They need to be redrilled for our bolt pattern,and the lower intake manifold needs to be modified as well.

JImmy,
why not do a write up (make it a sticky) on what year to look for,casting numbers, what's required to mod.possibily some pics and what not.... :2cents:

 

[SonomaGTlover]

Re: Vortec Heads??

I have some pics of the Vortecs I did on SoGT#549 via my signature.
Also, here is a decent write-up that many have referred to.
Vortec Head Mod

 

[5SpdTy]

Re: Vortec Heads??

well with out the hassel of redrilling the heads and intake man work, will ported and polished L35 heads from my jimmy be better than ported and polished stock ty heads?

 

[SonomaGTlover]

Re: Vortec Heads??

well with out the hassel of redrilling the heads and intake man work, will ported and polished L35 heads from my jimmy be better than ported and polished stock ty heads?

Yes, definately better than the stockers. Somebody help me here... I think the stockers flow about 160cfm where the Vortecs would be about 270cfm. The L35's are somewhere in the middle around 210cfm. I know there is a post here with the correct numbers if you search for it.