Hi Chris You have the right basic idea. The fuel pressure at about 50 psi should work ok for stock 350. Have done the 19 lbs (305) inj in my pu until i started towing a trailer then switched to 24 lbs. Vance PS does the wrecking yard have a second tpi unit? Want to do v-8 swap into a s-10 blazer. Already have 305 eng.