Well, I'm not one to slap things together either. I've been building motors a long time, but this is my first build using GM's vortec heads. So my question is based more around them than anything else. Was just hoping someone here had some experience with them.
As far as the build, it's going in that stepside Chevy truck I posted a few weeks ago. I'm not sure if it's a 2 or 4 bolt block, but honestly, I'm not building it aggressively enough to matter. For what it's worth, I'd always go 2 bolt over 4, in favor of the thicker webs, then I'd have it machined for splayed caps. That is, of course, if I wasn't going to use my favorite...the LS based motor and its 6 bolt mains
The cam is actually 525 lift at the valve, I misspoke. 112 LSA, and a split duration of 218/228 @.050. RPM range should be in the 1500-6000 neighborhood. I plan for a 2500 stall torque converter in the 700r4, and 3.73 gears.
Compression will be right near 9.75:1 assuming a .010 piston-to-deck clearance and a .040 head gasket. Cylinder chambers are 65cc on average.
I'll use a small base HEI ignition with a slow advance curve to keep detonation to a minimum. Fuel will be fed by a Holley 650 vac secondary carb or a barry grant (haven't decided 100%) and the intake will be an Edelbrock Performer RPM Air Gap. (unless I decide to go for looks instead and do a dual quad setup with a couple 375cfm holleys)
I am figuring the combination should make right around 380hp at the crank and break into the 420 range for peak torque, averaging 395 or so across the RPM band.
I know the heads will support the larger valves, but I am not sure if my intended power levels and rpm range justify the expense.