Building 306 , need your opinion/suggestions

As far as CHP and DSS call them and find out about the comp. with your heads if you want to go with or check out a kit.

I would look at a kit that had rods/pistons only really as the crank seems to handle more power than the block. I am totaly happy with my DSS pro-bullit 306 shortblock and would rec. them. I also have heard GREAT things from and about CHP.

I would aim for 8.5-9:1 comp. and would guess with those heads and 12-15lbs of ter-bo boost would reach that goal with suporting/matched parts.

here is a thumbnail for doing a bottom end.

0 Balance is always preferred. Most kits I see are 28oz imbalanced. If you keep stock throw crank you can probably stay with a 50oz FW and balancer saving some cash (check the balancer for slipage)

Good head bolts or studs. ARP

Good quality Head gasket. SCE....this should be considered now for compression ratio.

Lower end gasket set. Rear Main seal and pan gasket.

Cam bearings/Installed by the machine shop after line bore.

Freeze plugs, the machine shop should pull and install new ones when the clean the clock. Use brass.

Rod/Main bearings. should be STD/STD

Camshaft (unless a carryover)

Good quality timing set.

All your old hardware cleaned and ready to go. Bolts/studs/nuts etc.

You have a few factors regarding comp ratio
1. Head CC
2. Piston comp height
3. Head gasket thickness and diameter
4. Piston dish cc
5. Has the heads or block been milled.

You will have to ask the rotating assembly supplier about the piston specs.

Oil pump

With a main girdle you will probably need an aftermarket oil pan. If you go with a pan from canton/moroso/milodon you will need their pickup also.
Canton has a kit that includes the girdle/pan/PU etc.

I would look into a set of ARP main studs. I think some girdles require them.