you dont need best the stock can pretty much utilize the 49 as is
stock with list above i was good to 117mph
with a pte fmic and ported heads ive seen 10s at 121mph
did a buddies GN ttop and with stock short block added pte fmic ,212 flat tappet cam ,alky , th downpipe and protorque 3000-3200LU converter , ported heads , hi-pro trans rebuild (no billet) , 50# inj , mt 275/60 drs on a tt street chip he went 11.2@ 119 at 19-20 psi with a 1.52 60' , before the cam he ran a 10.96 at 121 with a 1.63 60' but had boost at 26psi
another buddie has alky rebuilt trans , 2800 LU west coast converter , fender dump , dutt neck , edelbrock cam , 50s same streeet chip as above, MT DRs 255/50-16 and rest is stock even suspension is stock with an air bag in a heavy Limited he regularly runs 1.55 60' 11.5 114 mph and has been 11.3s