Re: 454 W/ tunnel ram for the street.
Why not a pair of 450 holleys and just a mild cam and 3.73 gears? Keep the cam street able, maybe not going for the last horsepower but keep it drivable.
I did a single quad tunnel ram on a sb400 with a 625 Carter. 3.08 th400 stock stall converter and it was perfectly driveable. Jim
68 el camino custom, daily driver 327 th 350
70 chevelle, SS clone 454 4 speed
71 el camino, SS clone (sold!)
71 nova 350 4 speed with 4.10 gears! Sold
71 camaro. (owned since 1978!) 6-71 blown small block!
67 el camino 307/th400-3.31 12bolt Sold