Hi Jeff
Yes it has the straight manifold. The exhaust goes through the base slot on the left hand side, this slot was also on the grey one I had but being a Briggs on it it wasn't used. I haven't looked at the pulley yet, have to tip it up to do that and at this stage I'm trying to figure out the noise and if I can't then I will have to change the motor, then I can put some pics of it here. No sliding plate, motor bolts directly to the chassis.Muffler on this one is noisy too, I find the majority of them are.
Noise has me stumped, doesn't sound like bearings, more of a scraping/scratching/something hitting noise, I had one similar recently but it was a FC and I swapped over everything I could but the noise remained, had to be internal somewhere. Motor ended up in the "I will look at that one day pile"