I didn't keep updated with the formula because I was building my street 1600 kent with v6 intake valves,BCF2 cam,32/36 weber,1300 pistons with a 2mm decked block,polished conrods,polished crank,a balanced bottom end...a 5speed sierra conversion with a 3.89 diff in my mk1 escort and suprisingly the engine made 109whp which I was impressed with hopefully I'll take it too the track and tell you guys sometimes...Those flat top pistons aren't 1300 pistons they actually flat top pistons which I'll get custom made...and the conrods will be forged..the crank will be knife edged to loose someweight...the block will get a strengthing liquid which I'll import...I'll use hardened V8 pushrods...roller rockers,I'll put all the good stuff in this engine...its not going too be something too joke around...I'll use this engine for 1/4 mile drags only and maybe some saturday night racing....lol..