1970 340 has the 1973 low compression pistons

Thanks for all the replies guys, appreciate all the input.
I'm taking the block to be checked out this week and here's the recipe that I'm working on:
*Stock crank and rods
*Melling HV oil pump
*speed pro L2316F pistons
*stock 340 X heads with felpro severe duty head gaskets .0499 compressed thickness
*Comp 268 cam and Melling timing chain/gears
*stock valve gear
*Mopar M1 dual plane intake and 650 Holley DP
*Chrysler electronic ignition
* 1 5/8" headers with 2.5" exhaust (on car now)
Did I forget anything? lol
As I said I'm on a tight budget and can't afford excessive machine work and parts, I have to do some foraging to afford the new pistons lmao
This will probably be the last car I ever do so I want some power but also dependability.
Please give any input or ideas, I'm open to any. Thanks again
In my opinion the HV oil pump is not required, put a standard volume pump on it and check the pump clearances.