Post road trip
About a month ago, I got my 1970 Mustang back together. Thank you to everyone who provided advice and suggestions, this forum helped me a lot with my mini-restoration project.
I just got back from a 2500 mile road trip to see family and friends in NY and PA, and overall the car did great. I had one issue, about halfway through: at one point, when I pushed in the clutch to stop at a sign, the RPMs dropped to 200, then after a moment the engine died. It restarted, but very hesitantly, and ran rough for the remaining 1/2 mile to my mom's house. Turns out the primary bowl float was set too high, which is odd because I could have sworn I set it right. A quick adjustment and the car is running perfectly again.
The new suspension feels great. I put Eaton 138# leafs in the back, Moog heavy duty coils in the front, 1" Shelby drop, Bilstein steeet valved shocks, and roller perches. No big sway bar yet but it's already a major improvement.
One question: I changed my oil before the trip with Pennzoil Platinum high mileage synthetic, a bottle of ZDDP additive, and a can of Restore (engine was starting to burn a little bit of oil, Restore seems to have stopped this). I drive this car a lot, so pretty soon I'll have oil with 3000 miles on it that's only 3 weeks to a month old. I know 3k miles is a general rule of thumb for classic cars, but this is synthetic oil with lots of highway mileage. Should I change it at 3k or go a little longer? Engine is the original 302, as I mentioned above it was starting to burn a little oil before I added Restore, compression is slightly uneven.