My 340 build

My suggestion is/ was is to put the Lunati in and run it and see how you like it with your driving habits
run a compression check
and see- maybe even the 703 is too big IDK
do you have true compression numbers? head flows approx? what exhaust if you posted these I forget
do a stall test
you can regrind the comp if it now has a stock base circle and the Lunati is way too big even reface your lifters