having a 360 built for my daily driven 87 w100 pickup. this truck is sitting on 33 inch tires. basically stock build. block will be .30 over and the heads will be freshened up.4027596 this is the number on the heads. i will also be installing a slightly better than than stock "RV" cam. i have an edelbrock performer which is on my 318 right now or i have this intake that cam with the 360 casting number 4027596. i was told this was a 340 intake. which would be better for low end and economy? this is just a work/daily driven truck nothing radical.