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E cams probably make the most sense for street use. Valves are same size and I believe ports are same for Ts and Es with Ss a little larger. IMO bigger ports wont help on the street. Ts have slightly less compression ratio so E cams will probably net 140/145 hp or so. That’s assuming recurving the distributor to e-specs, some jetting for the carbs, and a good valve job. Use the Webers, Zeniths are OK for stock but hard to hotrod. If you don’t have one get a bosh distributor, use E advance springs and E rotor. Parts for Marellis are stupid expensive or unattainable. Not much else can be done without new Ps&Cs and lots of $$$$.
E cam profiles on your T cams about $900, vale job $1,200 to $1,600, Bosh distributor (w/parts and recurve) $400+, engine rebuild kit $400-$500, endless odds and ends $2K+, labor $3K-$4K. No mater what else you do get some books on 911s i.e. 101 Projects, 911 Rebuild.
Ts make nice around town and road cars. Also, lots of fun for Auto-X and some DEs. Why not spend the money on suspension renewal/upgrades, “good tyres”, period correct wheels and some “driving events”(keep the cookie cutters, introduced in ‘74 for track tyres).
Oh yeah, real nice car!
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