My approach...
1.) Basic rebuild:
1978 200 block and head
Bored .40 over (I had to go 40 to clean up the walls)
Block milled for zero deck height
Head milled for 9:1 compression
Valve seats opened up
Valves back cut
I used stock replacement type pistons but you can also use the flat tops from a HSC engine out of a Tempo.
2.) Cam/Valvetrain
Clay Smith 264/274/112* hydraulic
289 V8 valve springs
Cam degree'd on installation - it was straight up
Stock non-adjustable rockers
*I have adjustable rockers I might try this summer
3.) Exhaust
El Cheapo 6-into-1 header from Mustangs Unlimited
2.5" single outlet with turbo style muffler
4.) Ignition
Duraspark II
Timing set to 12 degrees initial (if I remember right)
MSD Blaster II coil
5.) Fuel
Carter YF
Electric choke
Stock 1978 mechanical fuel pump
6.) Misc.
Alternator conversion
Aluminum radiator
I enjoyed this setup as a daily driver for a while, until my transmission gave up the ghost. It was a nice upgrade for daily driving over stock. I wouldn't call it "fast" but it was more than adequate for scooting around town. About 20mpg on the highway. The redline isn't that high and the torque peak is pretty low so with the C4 I always felt like I needed a 4th gear (I have an overdrive manual on it now, but I haven't driven with it yet).
If I had it to do over again, I would have:
Used the flat top HSC pistons
Raised the compression ratio to 9.5 or even 10:1 (With 9.5 it could probably even handle regular since all gas here in GA is 10% ethanol)
Done a little Dremel work on the ports to clean them up (casting quality leaves a lot to be desired)
Used a roller timing chain
Adjustable rockers
Maybe installed the cam with a little advance
Milled the head for 2v direct-mount
I was limited by time and budget, and I didn't want to go too radical since this was the first ever engine build I've done. Some of the things like the rockers and timing chain I can still upgrade later on if I feel like it.
Hope this helps you decide
