I can't tell you mine is the fastest, but I can show some pictures of a couple that I've built....
Tilly 304WX
1:2 reinforced rockers
.275 dyno cam
Stage 4 NR head - 4 angle valve job, p&p, milled .065"
Billet fw and rod
26lb springs
Tilly 334wx
15cc clone head ($20 ebay special) w/ stock valvetrain
.265 AGK Cam
Billet fw/rod
And here's my current build that will be going on a custom Bob frame.
Tillotson 304wx bored to .900", .310 Isky cam, MDB p&p milled .040 14cc head, billet rod, Raceseng S2 finned flywheel, Raceseng Hybrid aluminum push rods, Raceseng Rev roller rockers, 55lb dual springs bv head.