I chose a 445 for my truck based on the block I had
Mine is not wild, and has not been dyno'd but runs stronger than I expected it to by a significant amount. I have been fighting a noise that I think is a cracked or defective piston in pin area, but the thing runs strong, just haven't run it much until I figure it out. It's definitely a parts problem not a 445 design issue, need to pull it over the winter, too busy running the Mustang in the good weather
Build
- 445 inch - 10:1 compression
- D2 heads flowing 277 @ .550 on the intake side and 177 @ .550 exhaust, 2.09/1.67 3/8 valves, close attempt to match ported med risers on intake side, went for best we could do on exhaust side
- RPM intake port matched as deep as we could, significant plenum divider and plenum roof work, 1 inch spacer matched to plenum divider work
- 1000 cfm vac sec HP series
- 1 3/4 Hedman long tube into 3 inch mandrel bent with X pipe, Jones mufflers (like Magnaflow)
- Bullet 282S copy cam, but centers spread to 112, on 106 ICL, lashed at .014 cold (specs for .028 hot) so a little tighter, with Erson rockers
- Duraspark recurved with blue strand box
This combo will take a 4400 lb 4x4 with a NP435, 33 inch tall tires and 3.50 gears through the gears like I have never had the truck pull. Think musclecar not truck, it's like a light switch when you hammer it. The 445 significantly outruns the same vehicle with a 270S 396 with a 150 shot of nitrous (old configuration) Actually considering 4 linking it once I find my noise
I really like the 445 for a street toy, significantly cheaper to build than a 462 or 482. That being said, I love my 489, but if I didn't have the 427 block, the Mustang would have likely been a 445 or 462