This is what I have a 350 casting # 3932388, 1969 according to to what I could find,its a 2 bolt main.on the pistons it says .40 doe's that mean its been borred 40 over
My ? Can someone give me a list of what I need to make this engine give me over 300 hp
I have a set of vortex heads
Don't have a cam ,don't know what to get..

 

Yes it's probably .040" over (not .40" over... that would be ... MASSIVE)

You need good heads, good exhaust, good cam, good tuning. Then you need good gears, good hookup, good converter, to use it.

Never heard of "vortex" heads. Sounds kinda .... chinesium, like somebody trying to get as close as they can to the real thing without getting sued for trademark infringement. Who made em? Wheredja get em? Once we figure out what that is, and maybe determine the flow specs, picking a cam will be a whole lot more like science and less like throwing darts.

 

040 on pistons means they are 0.040" larger than stock, so yes engine has been bored out .040" (or as said 40 over which is .040"... Stock 350's bore size is 4.000", yours would now be 4.040")

Vortex heads.... Do you mean Vortec? Like the 062 or 906 casting heads used on 1996-2001 L31 350 engines in the full size chevy/gmc trucks/SUV/vans?

If so they are good heads, real good heads.

Can you take a pic of your pistons and post... Are they dish, flat top, or dome? 2 or 4 valve relief? This will effect compression ratio

As it stands though for a good 300+ HP budget built I recommend.

One of these intakes
http://www.summitracing.com/parts/su...make/chevrolet
http://www.summitracing.com/parts/su...make/chevrolet
http://www.summitracing.com/parts/pf...make/chevrolet

This cam
http://www.summitracing.com/parts/sum-k1103

These valve springs
http://www.summitracing.com/parts/hrs-98111/overview/

Fel pro 1094 head gaskets
Fel pro MS98000T intake gasket set

600 to 670 cfm carb

1-5/8" tube headers
Aftermarket mandrel bent Y pipe, and complete exhaust system

2400-2800 rpm stall torque converter, 3.23 to 3.73 rear gears