I have decided for the time being with gas prices and all to keep and build up my 305. I would really like to get some Vortec heads, but I am confused on what fits and what doesn't. Do 305 Vortec's exist? If so will they bolt onto an 85 305 block? And is redrilling them to accept the factory intake a bad move? Any help is appreciated as always.

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85 IROC,tpi,t-tops,fully loaded,black with red l/s "camaro" interior,91 Bose system, Fastchip,TES,AFPR,K&Ns,92 police 700r4

"The devil drives a Camaro"

 

I don't know if they'll work with the 305 but I would suggest calling Scoggin-Dickey (sponsors here) and ask for one of their tech guys Brian. He should know or if not, he can figure it out.

Other than that, GM sells several Vortec heads some with or without egr crossovers. And in october GMPP will be offering a TPI manifold for use with Vortec heads. The perfect match!

Look into it, that would be a cool combo with the right cam.

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1991 RS LT1
every imaginable bolt-on, and an all-forged 355 on the way with an ATI following in '01

2000 C5 Coupe
black/black 6-spd, optional polished rims, 'mostly' stock....

"So what DOES the back of a Mustang look like?"

 

also look into any compression changes with those heads compared to the stock ones

 

Yes there are vortec heads that will fit on our 305's. I belive that they are on mid 90's chev trucks. They are very similar to the Alum L31 vette heads except that these are cast iron. You can get a set of Vortec heads from (I think) Jim Pace GM perf parts that have the standard intake bolt pattern already drilled and tapped. They are an extra 30 bucks but it's cheaper than spending the extra 100 for a vortec specific intake. Yes they will fit on an 85 block. They are the best bang for the buck heads for a 305 out there. They are definately on my Chrismas list. I would definately think about getting the retrofit rollers as well if you are going to run vortecs. Since you are saving the money anyway. And by the way don't let anyone tell you that you are stupid for building up your 305. You're not I did it and I love it. Email me if you want some advice. I have a few things that I would have changed with my build up. Just my .02

BTW: Yes you have to Mill the heads down to 58(or 56) CC's I believe that stock is high 60's. Car craft did a build up using them I believe that they milled .035"?? That seems like a lot to me. Pablo, I think has some good info on these heads.

Later,
Lars

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'92 RS 305 TBI
K&N Open Element
Ultimate TBI mod's (thanks Pablo)
Cam[.442"/.465" x 218*/224* @ .050", 10:1 Hypereutectic Pistons
Performer Manifold
Shift Kit, Corvette servo,
and 2800 Stall Trans Specialties Converter,
Gutted Cat, IAT Resistor
MSD Blaster Coil, Accel Cap and Rotor

[This message has been edited by lars92RS (edited September 18, 2000).]

 

no such thing as a vette L31 head. and yes the vortec 305 head will work.