Editing Talk:Identifying Chevy engines

im building a 383 stroker full rollermotoor having trouble with the geometry getting the right pushrod length  i have a Howards 110265 hydra roller cam,98212 howards springs @ 1.5 not 1.6i have world cast heads with flat top pistons,i also have howards hrs 91164nhydra roller lifters,spring height 1.750,valves are 4.925 stock length started with a7.187 broke two 7/16 studs called howards tech support they said was to long said i need a 7.150 bent not every cylinder  but 1 or 2 on each side now there telling me i need 7.144 ive spent 200.00 on pushrods that howards has not giving me no help on i just need some help finding the right pushrod length please help Tony