Originally Posted by
xxxrcnitro
I'm rebuilding my Lamberto Callari gold head B-7 I believe these are the same exact engines as werks? I was just wondering if WRXTL21070010]WRXTL21090120]will fit this engine. I also run a B-7 Pro This has been the best engine I have ran.I wish I never tried NR nothing but flame outs!!The B-5 will be the next engine I buy. Maybe Santa will be nice to me this year? But,only if I'm nice to her....

Yes, the rod and rear bearing will work with the older Collari engines.