how does this sound to you?and this is a little out of character for me as my vette(similar to your vette) is a gas guzzler now.
111145-10 CL111145-10 272 278 219 225 .510 .525 110 106 Hyd. Hyd. 1,2
1500-5600 Fair idle, Performance Street, Nice streetable mid range power
this or similar hydraulic roller,especially with the lower intake centre line.
750 cfm edelbrock performer air gap,less than 10:1 CR,not sure what petrol you have there?
1 5/8 tube headers into 3 inch mandrel exhaust ( do you have the cross member that allows true dual exhaust?
heads rpms are ok heads.if you have a th 350,change that out for a 4 speed auto,,2 reasons,lower 1st gear ratio will make that car jump and O/D will save fuel,especially if you get a lock up converter.16 -1800 stall.this combo will exceed 350 hp and be very drive able.If you have the fibre glass rear leaf,change that too,also check trailing arms for separation,mine did under accelleration,,
what rear gear ratio were you blessed with?