I have a chevy 350 out of a 1990 chevy 1500 4x4. I think it has about 200 horsepower right now and I want to rebuild it and get 300-350 horsepower. I probably don't want to spend more than $900 I also want to put rebuilt vortec heads on it and that will cost about $250.|||You'll need to upgrade to higher compression pistons and do some research on camshafts.|||Your not going to do it for $900 thats for sure. You can do it for cheap though.
Compression, heads, cam, exhaust an intake is the key parts to power in order.
If your rebuilding it, you will need a $1500 min budget.. Ifg your just swapping parts to gain power you might get by with your $900 budget.
The vortec heads is a great head for what you want, but at $250 its gonna be a stock used head that will need some upgrading. The stock vortec head is limited to .450" lift due to spring pressure and retainger to guide clearance.
The springs aint a prob, you can pick up a good set of howards spring for $30 new, but the clearance on the guides is what will get you. Two ways of fixing the prob.. You can buy the tools or take to machine shop and have them cut down the lenght of the guides, or backyard way you can flip the retainers upside down and grind 1/32" off the longest part with a bench grinder or angle grinder and clean them up and reuse.
Next the vortec heads is gonna need a diff type of intake as the vortec only uses 8 intake bolts and has taller ports.
You want flat top pistons, about 9.6 to 9.8:1 compression, a 216 to 218 degree intake and 226 to 230 degree exhaust cam @ .050" with a 112 lsa. The vortec heads, RPM air gap or crosswinds intake, long tube headers, and dual 2.25" exhaust
That will put you in the 350-375 HP range easy.
For your rebuild kit best price will be northern auto parts, and for your valve train parts competition products will have the best prices
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