Build it exactly as you would if it was a 350, except only use a 1.94x 1.50" valve set.
use a 76cc 350 head. such as the #920 casting. Or a Dart/WP 72+cc S/R head with 1.94x 1.50's Fully hand port the heads. These heads will easly flow 230++cfm when fully ported
Do not use 2.02 valves. felpro 1205 gasket size is plenty big.
Use a solid lifter cam and valvetrain. EG : Crane F278-2 or F280-2 (roots or centrifugal blower)
Use crane 1.44" double springs or a good stock diameter spring like the Isky 235D
Drill and roll pin the rocker studs or replace with screw in type. 1.5 rockers are fine
Bore it + .030 use a flat top or dished hyper 305 piston.
If it is going to be getting a power adder ope up the ring end gap.
If the customer insists on using head studs, double the price and void the warranty.
(they often seep coolant up the threads on stock SBC blocks) They are not nessessary anyway.
The cr will be a low 7.85:1 with a flat top piston
and 7.37:1 with a typical -12cc 305 dished piston.
use the stock 305 crank, stock 305 or 350 rods resized w new ARP rod bolts.
It will rev well beyond 6500 and make very good power with a blower on it.
If the customer is going to turbocharge it you will want a custom turbo cam for it.
Since you have no control on how this engine will be used, write on the bill/work order "NO guarantee or warranty/ race use only"
Get him to sign off on that before you start. You have no obligation to warranty this motor but must make that clear in writing.
This engine will need a very high 8" 9" 4000+ stall and lots of gear. It will really like to rev up.
If the customer whats to use a hyd cam tell him to go somewhere else.
this engine will rev up higher than required. Will be lame without a blower. But will GLH with one. You can hit it with quite a bit of boost on 92+ octane.
Last edited by F-BIRD'88; 04-25-2013 at 05:12 AM.