1994 C1500 ENGINE SWAP, TBI ON GEN 1 PRE 87 SBC

[travis mattson]

I want to put a gen one style sbc in my truck with a tbi adapter plate on spread bore intake and use all factory TBI system, delete egr. I have bone stock 305 tbi engine now
this is the engine I am looking at a basic pre 1987 sbc 350
https://www.summitracing.com/parts/nal-10067353/overview/make/Chevrolet

has anyone done this and anything special I need to do, will my current ignition work? flex plate etc

 

[mattbrat004]

Why not just put a 350 from your year truck in? Not sure if you can use a vortec engine from 96 up but that would be the way to go. I'm sure itd be easier on the pocket book too.

 

[travis mattson]

more head options with older intake style, GM std 260 hp is $1600, TBI $1800 VORTEC $2000. I have std sbc intakes and parts already

 

[90halfton]

You'll have to tune it for any gain, or in some cases to work even decently.

 

[travis mattson]

what would be the best route then to get 250-280 hp with factory tbi

 

[arrg]

A stock vortec 350 with headers and a tune will put you in the 250-280 hp ballpark. You can't really get around the tune part if you want to make more power than stock.

 

[Chewy1576]

Stock 305 TBI system on a 350 will definitely require mods. First would be 350 injectors (61 lb/hr) or bumping fuel pressure to supply enough fuel. You will also need a custom chip for the EGR delete and any fueling changes because of the carb intake. With some fueling and timing tweaks, I think your HP numbers are possible.

 

[wheelman]

go old school..350 v8.new at jegs.1400 1600 delivered.it is a new engine.aluminum intake edlebrock carb-HEI distributor-i seen where guys-were buying a cadilac.fuel filter.that has to out lets.one small and one large.they routed the small one back to the tank and kept the TBI electric intank fuel pump system.later aluminum heads on that old school 350.just ideas.

IT IS ALL ABOUT MO NEY..

 

[Steve A]

87 or newer block would be good because of 1 piece rear main seal and hydraulic roller cam compatible. Mild hydraulic roller cam, heads updated with matching valvesprings. TBI intake bolts to pre vortec heads IIRC. Stock distributor with a melonized distributor gear if running HR cam. All stock sensors installed for computer.

Definitely will need a chip burned to run right and to get maximum efficiency/power.

 

[Chewy1576]

TBI intake will only fit 87-95 TBI heads. The intake bolt holes on 86 and older heads are at a different angle.


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