Thats an OS FP 60. I was surprised at 13000 with an 11 x 7 out of mine on 5% nitro. That is very appropriate power for the non-piped time period. The only real negative is weight. The K&B or Lee Custom is about 7 oz's less. I think the Fox 60 (Eagle I) is the lightest. The ST V-60 and Evolution 60 NX are very close seconds, if weight is a consideration. The FP 60 is a no fuss engine and a great fit for many older designs. I love designs from this time period!