If you use the Crane advertized durations in the typical dynamic cr calcs you will get a false dynamic cr.
Crane measures their seat durations 288°-296° at a different spec (.004" instead of typcial .006" lifter rise. This makes the advertised seat numbers bigger they they are. (@.006")
The 11:1 mechanical compression ratio is a bit too high for daily street use on premium unleaded on a engine without computer engine management to keep it out of trouble under less than optimum operating/driving conditions. (like when things get hot in traffic etc). Build it with a real measured 10.5:1 or a bit less and it will be trouble free.
The Crane (HR) hydraulic and (SR) mechanical street roller cams are a premium product using a billet roller cam core with a pressed on cast distributor gear on the end to be compatible with standard distributor gears. (a bronze distributor gear is not required). thats why they cost a bit more than some other brand street rollers that are a cast cam core. (ya get what you pay for)
The one you have chosen is a good one for moderate street performance with a broad power range. Consider 1.6 intake rocker arms for increased intake valve lift to take full advantage of the good AFR cylinder heads.
a 3.55 to 4.10 gear rear gear will work very well. Can use a stock 12" "2100 stall" converter and really rocks with a 2800-3000 stall converter. use a 10" 3500 stall and 4.10's for max drag performance on drag slicks or ET streets.
Last edited by F-BIRD'88; 02-05-2011 at 11:43 PM.