273 and 318 doner parts for 340 Build

i'm building my first 340. I purchased just the block for 250 which cleaned up 40 over with one cylinder needed a sleeve

For the top end I have purchased eledelbrock RPM cylinder heads(63cc), air gap intake, valve covers and fitech mean street Carb replacement system.

For the bottom end I have a 1967 273 that came in my barracuda and 1968 318 for parts for the bottom end. Here is my plan for parts....am I making any mistakes for my 340-390hp build for my weekend driver.

Parts from the 273
Forged crank
Oil pump shaft and dist. Gear
Push rods
Adjustable cast rocker arms
Timing cover and water pump
273 stock oil pan

Parts from the 318
connecting rods (full floating pins)
Modern gear reducer starter

The machine shop doing the work is supplying the cam, lifters, flat top pistons and rebuild kit with oil pump and pickup. They agreed all the part selected will work under 7000 rpm.

Does every one agree? Would you substitute any part listed for the bottom end anything new? I'm a little worried about the oil pan capacity and connecting rods. I will be running the A904 and I will be surprised if the shift points will allow me to get above 5200rpm.