Critique my mismatched Teen Build.

Heya Guys.. and Gals of course.

Below are the specs of the 318 I am building.
No.. I'm not building a 360.

What sort of HP figure and performance do you think I might achieve with this perhaps somewhat mismatched set of parts I have gathered. This is my first ever build and yes I realize that I have already made some mistakes here but the parts are purchased/money is spent and I don't think the engine itself will be that 'terrible'. Hopefully.

1976 LA 318 Block bored 0.020" over to 321 cubic inches.
KB167 Hyper pistons. Block Zero decked.
Stock Cast crank linished/polished, Resized stock rods.
Entire rotating assembly balanced.
Edelbrock Performer RPM heads #60779, surface milled to 61cc chambers.
Yes.. these heads are too big!!
With a 0.038" head gasket I will only have SCR of 9.85 / DCR of 8.25
Yes.. I should have another point of Compression here!!
Hughes Engines Roller Rockers 1.50 ratio.
Comp Cams Xtreme Energy 'Xe262' Hydraulic Camshaft with matching lifters.
New Milodon Sump and Windage Tray.
Standard Volume Oil Pump.
Weiand Stealth Dual Plane Intake #8022.
Edelbrock Thunder Series AVS Carb - 650cfm #1806
Aussie Pacemaker Tri-Y design Headers, 1 5/8" primaries, 1 3/4" secondaries, 2 1/2 outlets.
2 1/2" Dual exhaust with X-pipe crossover.

This engine will be going into a 3000 pound vehicle with a 904 Auto.
I also have a Trans-go shift kit for the Auto, yet to be installed.

I am trying to achieve a Peppy Performing Street Car /Cruiser with at least 320 flywheel HP. The car is not a daily driver and will most likely only be a weekend Sunny day machine. This car would rarely get to a Drag Strip although future upgrades not ruled out.

Major issues that remain are that I believe I currently only have a stock stall converter and this will need to be bumped up... , and my Stock standard fragile 7 1/4 factory Borg Warner diff which at this point has really long legs also, 2.92 Ratio. Hehe, yes I know, I know. Yet to sort out what I'm going to do with the diff, at a minimum I will throw in some 3.23 gears.

I was also tossing up going to an 'off the shelf' solid cam but not sure what my options are with this... most solid flat tappets are huge for the performance level I'm chasing.
(and the rest of my current drivetrain)
Maybe a Solid Comp 270s or the larger xe268s but even that looks too big for this little Teen.

At this point until I upgrade the converter and diff I feel my current xe262 cam may be at my limit perhaps.

Thanks guys..
What are your thoughts guys?

Cheers,
Teedog

P.S Yes I know my heads are too big!

Yes I know.. Build it already!!!

Small update to the above.

The Weiand Stealth intake has been swapped out for an Eddy Air-Gap, mainly due to the massive difference in Port sizes and therefor much easier matching to the gasket and Eddy Heads. ( The tiny ports and casting irregularities left a lot to be desired, on my stealth anyhow although I know these generally are quite a decent manifold. )
This could possibly hurt the very low end of my torque curve a smidge but hopefully this will be negligable.

Also changing to ARP Mains and Head Studs instead of bolts. Have ARP bolts in the Rods.

Still undecided on Cam upgrade and still thinking small 'Streetcar' Solid

(1) Comp Magnum Solid 20-246-4 270s
Great in 340 & 360 with 9:1 to 9.5:1comp., 650 to 750 CFM carb. and 3.55 to 3.91 gear. Largest cam to use with stock converter.

LSA 110 degrees.
Duration at 0.050" Int 224 / Exh 224
Lift at Valve with 1.50 ratio rocker Int 0.468" / Exh 0.468"
Valve lash 0.022" Int & Exh.

Ideally I was thinking something between the 270s and the XS268S solid cam.

I know it has been suggested that I run a larger Cam with this combo but just interested on how you think the performance from this small solid would stand up compared to the XE262 or XE268 Hydraulic cams?

Anyone else have experience or suggestions in regards to 'small Solid Cams' in a 318?
There don't seem to be a lot 'small off the shelf stuff for Mopar' that i can see.
Does everyone just go custom ground?

Cheers,
Teedog.