Did the engineers @ chevy come up with a intake manifold that will accompany these heads on my 305(minnie mouse)? Heres the problem, the manifold must be able to use the factory or holley t.b.i. unit. Looking for a direct fit in all aplications if possible. One other problem I am experiencing as of latley when the car slows down (automatic no shift-kit)it kicks down or bumps just before it brakes to stop. Local mechanic couldnt figure it out! any help please? thank you third. gen. heads!!!!!!!!!!

 

The good vortec heads are only made for 350's, and I dont know of one that will fit our TBI intakes.

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West Coast GM Shootout 2001!
1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

 

The bumping problem in your tranny could be related to the TV cable. Mine did that when the TV cable became disconnected at the throttle linkage. It also shifted into the next gear way too early upon taking off from a stop. Check and see if it's still hooked up, and if so, try readjusting it.

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89RS w/350 TPI; 69RS/SS w/450 HP 350/Muncie 4-Speed "Too weird to live, too rare to die."

 

there is a 305 Vortec rated at 230HP in the trucks. The engine is the L30, the 350 Vortec is the L31. the heads per pair are pricey at $754 but maybe you can find some off a truck. check the TBI board for more vortec head info. there are a couple good posts over there.

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-Tas
'89 Formula WS-6
[soon to be Torch Red with black hood and headlights =) ]

305, TBI, auto, 14x3 chrome flat based open element with K&N, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips....

Super GRK_Taz World
EFI & Intake Options
AOL IM: superGRtaz
ICQ 82881207

 

were'nt any of the vortec trucks tbi?

 

no the vortecs never came TBI. They were CPI or something. Not true 8 injectors. they had 8 popet hoses running fuel to the intake valve.

 

If you're using vortec heads you need a specific vortec intake, because bolt patterns on a vortec head won't accept regular SBC intake bolt patterns. Get an Edelbrock Performer RPM Vortec Intake or Performer RPM Air-gap Vortec intake. Then go to Holley and get a carb -> TBI adapter. Hope this helps