OK I have to ask: What is the intended use for your UTE, street driver, Track car you can still drive on the street etc.

I've found with all motor projects whether 2 stroke street bike, tow vehicle etc figure out what you want it to do and worry about the numbers later. What suspension and brakes are currently on the car now and what gearbox are you using? 150HP Ute with stock brakes and suspension won't be much fun.............it will feel twice as fast as it really is but it won't be fun. You can probably get 190HP out of the motor but without a close ratio gearbox the car will be constantly off the power band at the worst moment.

Figure out what your budget is $500 or $5000 and go for a broad based approach for a street car. You should be able to get 135-140HP pretty easy with a flat torque curve. Motor building is pretty straight forward, you just need to build it up as a matched set. I.E. don't fall into the trap of over carbed under cammed. IF your budget only allows for a 32/36 DGV carb then go with a moderate cam etc. If you can go with 10-1 compression, DCOE's, head with the ports cleaned up and matched exhaust you'll likely be way happier than if you went after that last 10HP but gave up drivability.

Case in point I have two Vintage MX bikes a 76 YZ125 and a 77 CR125 Elsinore: you can turn faster laps with the Elsinore but you're working twice as hard and the slightest bobble and will instantly drop 2 seconds a lap...........the Elsinore makes 3 more horsepower. I'm in good enough shape that I can still run 5K, on the YZ I can go flat out for 5 laps (15 minutes) but on the Elsinore at the end of lap 5 I'm spent, sure I've gone slightly faster but the fun factor takes a big hit. Sure I could train more but again, this is supposed to be fun.

Sorry to be so verbose but get the L series book, figure out what your budget allows, forget the "number" and then get the best set of parts (head, cam, porting carbs) for your system.

Tom