L69 road to 12s

hey guys i have here a challenge to myself to achieve a 12 second goal out of a L69 yes i could swap but no fun! after modding my 305 over time i never got a chance to make passes down the track so last week i made 4 passes but before i go on to times ill give you all a mod list...

L69 305
stock bore stock heads
lunati voodoo cam
weind warrior intake
holley 600 secondary vac.
eldebrock TES headers
double roller chain
160 stat
comp self align rockers
HEI distributor

i may be missing a few parts here and there but thats the main part of the motor thats modded now lets move on to drivetrain...

stock 200r4 (now slipping)
stock stall
7.5 rear open 3.73(one wheel peel)

The car itself have been on a small diet remember its a 86 monte carlo ss i havent weighed it yet but im curious to see where its at....

rear bumper taken off(behind bumper cover)
no wheel wells
a/c components off the motor
a/c condensor taken out
car currently on corvette rallies (which ima trade for welds soon)
and little stuff to shed small weight like headlight conversion etc

now lets move with times....ran last night as the car is described give or take and these are my results...

first pass just arrived at track car running at 175 after driving there from home didnt let cool down still have my heavy speaker box in the trunk and tool bag etc
r/t .374
60' 2.193
330 6.667
1/8 10.293
mph 68.95
1000 13.294
1/4 15.812(trans slipping a little bit)
mph 89.65

okay wasnt what i expected but fuel was getting low i let the car sit for a few minutes added two gallons off cam2 110 race fuel advanced the distributor a hair and went for my second pass...
r/t .449
60' 2.234
330 6.346
1/8 9.795
mph 69.41
1000 12.908
1/4 15.578 (trans slipped bad into third)
mph 84.70

okay that pass amazed me how gas and timing can knock time down dramatically so i let the car cool all the way down check fluids removed all the weight in my car (speaker box, tools, fluid bottles, etc) still running race gas and trans still slipping
r/t .228
60' 2.241
330 6.389
1/8 9.765
mph 73.18
1000 12.625
1/4 15.020
mph 92.94

now that pass i didnt expect but was excited cuz i was so close to my night goal of 14.99 or faster all comments welcome advice as well and ill be posting pics later today of the car and timeslips

Your going to want to change that 7.5 rear to a 8.5 GN rear if your aiming for 12's.

in the process of working a nice deal up for a 9 inch...soon the trans will be pulled and built

Awesome and awesome.

So your keeping the 2004r?

yessir! when the car is actually driven its on the highway majority of the time for shows or the track

At the track test n tune

I see. if that's the case, than getting a 2004r build would be your best option because of the overdrive.

You could also look at the 700r4, since it may be less expensive to build.

i was thinking of that as well but i like how the 200r4 turned out when i had it built for my caprice with a stall

I just figured that a 700 would be way cheaper as far as getting it built for power was concerned.