Hood straps are ...... heads that breath with bigger than stock valves.... I'd do oil cooler too just for extra oil capacity......
A couple of few comments- Most of it (hood straps, type of mirrors, trim or not, bumpers or nerf bars, bullet or teardrop taillights etcetcetc...) is how you envision your creation, and as Stan has said, it's a big tent and there's room for all of us (or something to that effect). What you do as to how it looks is up to you, and you're the only one that matters.
As to building a 1915- if you're designing the engine to rev to 6500 or 7,000rpm with power then bigger valve heads are appropriate, but for an engine this size that revs to 5500 or 6,000rpm ported stock valve (35x32mm) heads are the right size, as they are capable of 120-125hp (the engine will make 100-110hp), with the smaller displacement will give better airspeed through the intake ports at lower rpms so the air/fuel mixture will stay in suspension, the engine will make better power throughout the rpm range (and not just the top 500 or 1,000rpm), it will be much more driveable into the lower and mid midrange (where you will spend so much of your time on the street) and get slightly better mileage to boot. The better mileage thing isn't super important, but it tells you the engine combination is functioning at it's best...
Although 1900cc's or 2 liters is generally the point where an extra cooler starts to come in handy for hotter times, be clear that it oil in an auxilliary cooler and/or full flow filter does not add extra oil capacity to the sump! Any aircooled VW engine driven spiritedly (even a bone stocker) needs more oil capacity, only oil right in the sump is available to the pump for lubrication, and adding sump capacity is done by bolting on a 1 1/2, 3, or 4 quart deep sump.
Back to our regularly scheduled programming....
(and sorry, Tebs; it's more than 2 paragraphs, but I had a lot to say!)
Yoda out (for now, but back you know I will be!)