Chevrolet Performance Chev LSX Bowtie Engine Block Tall Deck # 19417354 Rate_Special Note: 1969 model year was Note: 1969 model year was a transition year for small blocks and you need to check your water pump and number of bolts on crank pulley Additional features include: Low restriction racing media designed for high oil flow 94 percent efficiency at 20 microns Silicone anti drainback valve on many applications 10 to 18 gpm recommended maximum oil flow deck height* 1054 billet steel 6 bolt main bearing caps* 6 bolt cylinder head bolt pattern* Cam bores that can be machined to accept 60mm roller bearings* Can be machined for larger diameter lifters* External oil pump feed at the rear* Added 7th transmission bolt hole to work with early style GM transmissions* Can accept a front motor plate for racing use* Threaded freeze plugs that can be used for external heaters or coolers* Windowed main bulkhead and can support displacements of 454 cu