Hey, nice score on the seats. Those are the type I'm looking at as well. I'll look thru an issue of Classic Trucks. There is an article on installing all types of seats in our trucks. I don't think you'll have a problem, maybe over the hump. NICE SEATS MAN!!!! And, oh yeah...It'll recline a little without the tank behind you.
__________________
1968 C10 Short Stepper
350/350 A/C P/S P/B Front disc
3/5 static/ 12bolt rear 3:73
1979 Pontiac Trans Am
10th Anniversary/455/4spd
2011 H-D Street Glide - CAMMED n lowered
Dad always said,"Son, if you can't be good...be good at it." 