How to add pics to a post?

What is the trick to adding pics to a post? Are there size limits?
The insert image button asks me " Please enter the URL for this image " rather than a file location?

Choosing Roller Cam

Seeking advice from those that are/have use a hydraulic roller cam in a Gen1 350 SBC

Car is a '84 Pontiac TransAm - Mecham MSE. This is not a daily driver as I use mainly for autocrossing & car shows. My skill level at autox is 3 years and improving. I place in the top 1/3 of our local CAM-T group (typically 1.5 seconds behind leaders). The engine & drivetrain was overhauled 6 years ago and at the time built for car shows... then I stated autox! I recently had a mishap with my cooling system that I believe has created a compression pressure leak at the head gasket. Under high RPM runs my coolant overflow tank will raise above HOT level and not return to proper level when cold. I have tested several radiator caps & thermostats and get the same results. Under typical daily driving conditions the system acts correctly. There is no coolant loss under any condition as there is not smoke or mix into oil. So I guess the engine is coming out and i'm getting rid of the hydraulic flat tappet cam & weak valve springs.

Current drivetrain setup (suspenion ungrades not listed) :
Sniper EFI, Sniper Hyperspark distributor, Sniper sparkbox & coil, manual WC/T5 5-speed, McCloud balanced lightweight flywheel & pressure plateDana44 housing w/ Eaton TruTrac 3:31 gears. (I know the gearing is to high but that's going to stay for now) Car weighs in at 3400 +200 driver. Best 1/4 mile time 13.05 @ 107mph.

350 SBC 4 bolt, high nickel & tin block, blueprinted
Forged crank
+.060 forged pistons
Compression: Static 10.01:1, Dynamic 8.28:1
Total Seal rings- gapless 2nd
Prepped steel rods
ARP hardware
Comp test (yesterday) = 193-197 psi
Leak down test (yesterday) = 99-99+ & 100 psi
Rotating assembly balanced
CompCams - Hyd Flat tappet 12-242 (224I/231E @ .050, )
@ +4.125 advance
Cloyes true roller chain

Dart Pro1 aluminum heads, 72cc, 2.02 & 1.60
Ported & cc'd
7/16? rocket studs
5/16? chromoly Heat-treated pushrods
Chromoly roller rocker arms
Polylocs
Felpro 1003 Head gasket
ARP hardware

Dart dual plane intake
Felpro 1025 intake gasket

FlowKooler 1773 machined impellar water pump
BeCool radiator
Becool electric dual Spal fans

ETC. Etc. etc.


If you got this far... thanks for reading and look forward to your comments.

Embedded pics not visible

So I am having trouble seeing images/pics posted inside the messages, all I get is what appears to be an icon of a page that looks like it is broken. I'm not very tech savvy so what do I need to to do to correct this? Thanks in advance.