TKF shows to be either a 78 350 165hp 4bbl or 75 2bbl 145hp. Both are supposed ,to be van or bus applications. I think there's a good chance it's a 4 bolt, but it is what it is & sounds like it runs excellent. Have fun with it. I agree w/ SBG that your plug wires are poorly run. I can't believe they weren't fried during the dyno run. W/rams horns I prefer not seeing them on top of the engine.