I run a 406sbc, 8.5-1 dished pistons, rebuilt factory rods and crank, ARP, #450 heads ( '77-'80 305 heads that were ball milled to open up behide the 2.02 valves, 58cc, UD cam 276/286 at .0045", 221/230 at .050", .454"/.454" valve lift, and 110 LSA (healthy lop ), GM dual plane Q-jet manifold, redrilled Q-jet, and headers. I run 36 total timing, 87 octang, no knock, or over heating with 6cyl rad, t350/shift kit, high 3's rear-end.
Mines not a a fire breathing dragon, but it is in a daily driven '68 El Camino, 20 miles to work every day. 100+ to -30, sun, rain, or 15" of snow.

What is it in, what is the cam? your mpg won't go up over 12-14 mpg even if you neuter it!


Pat