Does an FE bolt right into an 89 pickup?. I thought 76 was the last year for that because of crossmember issues.
No, it does not. But, where there's a will, there's a way.
You are correct about 1976 being the last year for the FE in pick-ups. Could have been some left overs in '77.
I used to have a 1979 F-100 2wd sb that went through a series of engines. It came with a 302 then I installed a 351C 4V CJ, 460, 460, 429, 428, 460. All of them I was able to use the stock engine mount perches. However, as I recall, I had to move them either forward or back for the 428.
The '89 has a 300/6 in it right now and I will have to change perches. I'm hoping to use the 5.0/5.8 perches and just mount them where the 410 needs them.
I'll share my installation once it's all together.