Hi Chuck My combo is a 3.625 stroke 4.155 bore to make 394 cubes Head's are an old set of 18 degree comp eliminator heads ported by Jimmy Bell Sheet metal intake with twin Terminator injection by Rons fuel injection .The car weigh's 1550 with me in it . It is not your typical FED combo but we wanted to run Division 1 Top Dragster wich I really enjoy so we had to step it up a little . The best we were running was 7.40's and we were having trouble Qualifying for these races so we installed a nitrous system on it ! This gave me a new goal and that was to run a 6 second run ! It took almost 3 years to get there . Alot of 7.0 runs and a lot of aborted passes ! We finally achieved our goal at the 2012 Dutch Classic at Maple Grove 6.94 at 191 . Now I HAVE TO FIND SOME NEW GOAL'S ! See you at the races ! Bill